Effect of Anodizing Potential on the Surface Morphology and Corrosion Property of AZ31 Magnesium Alloy

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Effect of Anodizing Potential on the Surface Morphology and Corrosion Property of AZ31 Magnesium Alloy"

Transcription

1 Materials Transactions, Vol. 51, No. 6 (21) pp. 119 to 1113 #21 The Japan Institute of Metals Effect of Anodizing Potential on the Surface Morphology and Corrosion Property of AZ31 Magnesium Alloy S. A. Salman 1, R. Mori 1, R. Ichino 2 and M. Okido 1 1 Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University, Nagoya , Japan 2 Ecotopia Science Institute, Nagoya University, Nagoya , Japan Anodizing is a functional method for coating magnesium alloys and improves its corrosion resistance. The anodizing process was performed on AZ31 magnesium alloy in 1 M NaOH alkaline solution at various applied potentials. The surface morphology and phase structure of the anodic film were analyzed using optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion property of the anodic film was characterized using potentiodynamic polarization measurement, electrochemical impedance spectroscopy (EIS) and salt spray test. The anodic film is composed of two phases, magnesium hydroxides and magnesium oxides. At low anodizing potential, the main constituent of the anodic film is magnesium hydroxide. By increasing the anodizing potential, magnesium oxide grows to be the main constituent of the film. The results show that the anticorrosion property was enhanced by anodizing and the film formed at 1 V has the best corrosion resistance. [doi:1.232/matertrans.m2938] (Received November 17, 29; Accepted March 23, 21; Published May 19, 21) Keywords: AZ31 magnesium alloy, anodizing, alkaline solution, anticorrosion 1. Introduction Table 1 Chemical composition (mass%) of AZ31 Mg alloy. Magnesium is the 8th most abundant element on the earth. 1) It has some favorable properties that make it an excellent choice for a number of applications, such as a high ratio of strength to density that is only 2/3 of aluminum alloy and 1/4 of steel, high thermal conductivity, high dimensional stability, good electromagnetic shielding characteristics, high damping and good machinability. 2) These properties make it an attractive target in a number of applications, especially in the fields where weight reduction is critical or particular technical requirements are needed. There are several applications of magnesium including automobile, computer parts, aerospace components, mobile phones, sporting goods, handheld tools and household equipment. Unfortunately, magnesium has also some inadequate characteristics that have delayed its wide scale use in many applications. Poor corrosion resistance is one of the major problems that prevent the widespread of magnesium alloy in many applications due to high chemical and electrochemical activity compared with other structural metals such as steel and Al alloys. There are two primary reasons for the poor corrosion resistance of magnesium alloys. The first reason is the internal galvanic corrosion by second phases or impurities, the second reason is the hydroxide film on magnesium is much less stable than passive films that form on metals such as Al alloys and stainless steels. Surface treatment was performed in order to achieve a good corrosion resistance such as electrochemical plating, chemical conversion, anodizing, thermal spraying, chemical and physical vapor deposition. Chromate bath was traditionally applied in spite of being not friendly to the environment. It is toxic to human and difficult to be recyclable. 3 5) In our previous work, we investigated the anodizing of AZ31 magnesium alloy in alkaline solution at 3V. 6,7) Anodizing in alkaline solution with co-precipitation of cerium oxide and aluminum oxide was also investigated in order to improve the anticorrosion property of magnesium alloy. 8,9) The anticorrosion and surface properties of AZ31 Al Zn Mn Si Cu Ni Fe Mg Others Imp <:1.1 <:3 Bal..3 magnesium alloy were significantly improved with cerium additives. In the present work, we performed the anodizing process at a various range of anodizing potential, 3 1 V. The anti-corrosion behaviors were evaluated using the anodic polarization curves and the electrochemical impedance spectroscopy (EIS). Furthermore, the surface morphologies and phase structure were detected using SEM and XRD. 2. Experimental Procedure 2.1 Specimens Commercially available AZ31 Mg alloys were used as the substrate. The chemical composition of the alloy is listed in Table 1. The surface of the alloy was polished up to # 2 emery paper followed by.5 mm alumina powders. The specimens were carefully cleaned with water, rinsed with acetone and dried under air. All of the experiment specimens were mounted using polytetrafluoroethylene (PTFE) resin tape, leaving 1 cm 2 surface area. 2.2 Anodizing Anodizing was performed at room temperature for 2 6 s in the aqueous electrolyte of 1 M NaOH using power supply (6 A, 5 V) to provide various ranges of constant potential to the anodizing cell. The anodizing potential used in this study was changed over the range from 3 to 11 V. AZ31 magnesium alloy is connected to a positive terminal of a power supply and platinum counter electrode is connected to a negative terminal. A digital multimeter and Ag/AgCl sat. KCl reference electrode was used to measure the actual potential near the surface of the specimen and keep at

2 111 S. A. Salman, R. Mori, R. Ichino and M. Okido Table 2 constant value throughout the anodizing process. After the treatment, the specimens were carefully rinsed using distilled water and dried under air before analysis. 2.3 Morphology and structure of anodic film The morphology and microstructure of the anodic films were observed with a Hitachi S-8 scanning electron microscope (SEM), an optical microscopy and digital camera. The crystallographic was identified with X-ray diffraction (XRD). The thickness of the anodic films was measured using SEM. 2.4 Corrosion measurements Polarization technique The potentiodynamic polarization tests were carried out using a Solartron 1285 Potentiostate from Solartron Analytical, Farnborough, United Kingdom. The measurements were controlled by Scribner Associates Corrware electrochemical experiment software. The anodic and cathodic polarization curves were measured in 17 mm NaCl and.1 M Na 2 SO 4 solution at 298 K with a scanning rate of 1 mv/s AC impedance spectroscopy Electrochemical impedance spectroscopy of the immersed specimens was measured in 3.5 mass% NaCl solutions in order to accelerate the corrosion rate of the anodic films. The impedance test was performed at 298 K using a Solarton 1287 electrochemical interface and a Solarton 126 frequency response analyzer with a frequency range from 1, to.1 Hz. in amplitude of 1 mv peak-to-peak AC voltage. The measurements were controlled by Scribner Associates Z plot electrochemical experiment software Salt spray test The salt spray and humidity tests of the anodic films were carried out in 5% NaCl solution using salt spray test machine, the test conditions are shown in Table Results and Discussion Salt spray test conditions. Temp. ( C) humidity (%) Time (h) Salt spray (5 mass% NaCl) dry wet The current transients for AZ31 magnesium alloy in 1 M NaOH solution is shown in Fig. 1. Anodizing was performed at different potentials 3 1 V, the current density differs with the anodizing potential changes. The anodic film formed at anodizing potential has a dark gray color. The current density does not flow immediately when the potential was applied. With progress of time the current density increased due to the dissolution reaction of magnesium as represented by reaction (1). Then, magnesium ions reacted with OH ions, forming Mg(OH) 2 as described by reaction (2). 1) The current density reached its maximum value (.2 A cm 2 ) at about 9 s and then remains constant until the end of anodizing process because the stationary of dissolution and film formation. Current density, i / A cm V 3V 1V 1-3 1V Anodizing time, t/s Fig. 1 Current change during constant potential anodizing of AZ31 magnesium alloy in 1 M NaOH solution at 298 K. Mg! Mg 2þ þ 2e ð1þ Mg 2þ þ 2OH! Mg(OH) 2 ð2þ Magnesium oxide can also form according to reaction (3). Several reports demonstrated that these structures can be converted into each other by either hydration or dehydration procedures. 11,12) Mg(OH) 2! MgO þ H 2 O ð3þ On the contrary, with increasing of the anodizing potential 1 1 V, the current flowed immediately and it decreased with increasing the time. Anodizing at 1, 2 V has the lowest current density values. Anodizing potential of 7 1 V nearly has the same structure of the current transients. Subsequently, we only show the curve of 1 V. At the first 2 s, anodizing process is accompanied with intense sparking. Consequently, the current density sharply decreased and became approximately constant at about 3 s. The decreasing in the current density value at anodizing potential 1 1 V referred to the formation of more protected anodic film in comparison to low potential anodizing as will be discussed in a later part of this paper. Figure 2 shows the surface images of the anodic films, anodizing at shows a very rough surface as shown in Fig. 2(a). Anodizing at 1 V shows a porous structure, the diameter of the pore was about.84 mm as shown in Fig. 2(b). Figure 2(c), (d) shows that the surface becomes smoother with increasing of the anodizing potential from 2 to 7 V. Intense sparking was observed at anodizing potential 8 V and 1 V. The initial structure of the film formed by sparking is porous microstructure with circular or elliptic pores as shown in Fig. 2(e), (f). The average pore size at 1 V was.21 mm. Film thickness has been measured as a function of anodizing potential as shown in Fig. 3, the thickness of the anodic film reached its maximum value (2.6 mm) at anodizing potential with gray color appearance. With increasing the anodizing potential 1 2 V, the thickness of the film decreased to be.18 and.15 mm respectively, and it increased again with increasing the anodizing potential 2 1 V. The anodic film at 1 V shows a white color compact film with thickness about 1.2 mm. When the anodizing potential increased more than 1 V, an intense spark was occurring continuously with randomly increasing and decreasing of

3 Effect of Anodizing Potential on the Surface Morphology and Corrosion Property of AZ31 Magnesium Alloy 1111 (a) (b) (c) (d) (e) (f) 3 µ m Fig. 2 Surface morphologies of AZ31 magnesium alloy after anodizing at (a), (b) 1 V, (c) 2 V, (d) 7 V, (e) 8 V, and (f) 1 V. 3 Mg(OH) 2 MgO Mg Film thickness / µ m 2 1 (a) (b) 5 1 Anodizing potential, E / V vs. Ag/AgCl sat. KCl (c) Fig. 3 Film thickness as a function of anodizing potential. (d) current density. Furthermore, no film was formed. Figure 4 shows the XRD patterns of AZ31 magnesium alloy after anodizing in 1 M NaOH solution at different anodizing potential. Figure 4(a), (b), (c) shows that the anodic films formed at anodizing potential 3, 1, 2 V were mainly composed of magnesium. Magnesium hydroxide and magnesium oxide peaks were also detected on the surface indicating that the anodic film is most probably formed from the magnesium hydroxides and oxides. Magnesium hydroxide peaks were not observed at anodizing potential 7, 1 V as shown in Fig. 4(d), (e). In contrast, magnesium oxide peaks was increased at 7 V, and it has the highest value at 1 V. These results demonstrate that at high potential anodizing, the main constituent of the anodic film is magnesium oxide. Furthermore, the magnesium hydroxide peaks were wider than magnesium oxide peaks indicating (e) θ (degree, CuKα ) Fig. 4 The XRD pattern of AZ31 magnesium alloy after anodizing at (a), (b) 1 V, (c) 2 V, (d) 7 V, and (e) 1 V. a good crystallinity of Magnesium oxide compared with magnesium hydroxide. In order to evaluate and compare the corrosion properties of anodic films, anodic and cathodic polarization curves were measured in 17 mm NaCl and.1 M Na 2 SO 4 solution.

4 1112 S. A. Salman, R. Mori, R. Ichino and M. Okido 1 Non-treated specimen 1 V.5 Current density, i / ma cm V E Non-treated specimen E / V Fig Anodizing potential, E / V vs. Ag/AgCl sat. KCl Variation of E as a function of anodizing potential Potential, E / V vs. Ag/AgCl sat. KCl 1 4 Fig. 5 Anodic and cathodic polarization curves for AZ31 magnesium alloys before and after anodizing at 3 and 1 V in 17 mm NaCl and.1 M Na 2 SO 4 solution. Generally, the anodic polarization represents the dissolution of magnesium, the cathodic polarization curves are assumed to represent the cathodic hydrogen evolution through water reduction. The anodic polarization curves reveal clearly that the pitting potential was moved toward more positive value with anodizing. Therefore, corrosion resistance has improved with the anodizing treatment. The higher values of pitting potential ( 1:34 and 1:39 V) were observed with anodizing at and 1 V respectively as shown in Fig. 5. The current density increased sharply after the potential exceeded the pitting potential and finally the pits appeared on the surface. On the other hand, the cathodic polarization curves were measured in order to get more information about the corrosion behaviors of the anodic film. The cathodic overpotential of anodic films has negative potentials in comparison to non-treated specimens, which indicates the increase of hydrogen evolution overpotential by the anodic passive films which mainly formed from magnesium oxide/hydroxide. When we compare anodic films formed at and 1 V, the specimen of 1 V has the best corrosion resistance during the cathodic polarization. However, the specimen of has the best corrosion resistance during the anodic polarization. Figure 6 shows the E values of all anodic films (3 1 V). E is defined as the difference between the potential value at.5 ma cm 2 (anodic side) and the potential value :5 ma cm 2 (cathodic side). E of anodic films formed at 3 8 V has nearly the same value.25 V and the lowest E values were observed at 1 and 2 anodizing potential around.22 V. The highest E values.33,.39, and.4 were observed at 9, 3 and 1 V anodizing potential respectively. Electrochemical impedance spectroscopy measurement (EIS) and salt spray test were performed to ensure the best corrosion resistance anodic film. Corrosion rate determination is associated with the charge transfer resistance (Rct) by using EIS technique. The charge transfer resistance is equal to the diameter of the semicircle in the complex plane graph (nyquist diagram). Figure 7 shows the time dependence of the charge transfer resistance, which R ct / Ω cm Immersion time, t / s 1 V 3 Fig. 7 Change in Rct of AZ31 magnesium alloy in 3.5 mass% NaCl solution before and after anodizing at 3 and 1 V. is corresponding to corrosion rate. The charge transfer resistance increases by increasing the anodizing potential. The specimen anodized at 1 V has much higher Rct value than anodic film. Therefore, the anodic film formed at 1 V has a more corrosion resistance than the anodic film formed at. It is also worth mentioning that the corrosion pits were observed with the naked eye on the surface of specimens after progress for 6 s. However, it was observed after 18 s at anodizing potential 1 V. Surface morphologies of the anodic films formed at 3 and 1 V before and after the salt spray test were shown in Fig. 8. Before the salt spray test, the surface of the anodic film formed at was dark gray because the formation of thick magnesium hydroxide film. After the salt spray test, the surface at the was rough with many pits were visible. The diameter of the observed pits reached 1 mm. On the other hand, the surface of the anodic film formed at 1 V a white color. It may be because the formation of a compact magnesium oxide film. After the salt spray test, the anodic film formed at 1 V has a uniform surface as before the salt spray test. Very few pits were observed on the surface, the maximum diameter of the pits was about 2 mm. Salt spray test results show good agreement with EIS and cathodic polarization results. We can conclude that the film formed at 1 V has excellent corrosion resistance compared with those formed at lower potential.

5 Effect of Anodizing Potential on the Surface Morphology and Corrosion Property of AZ31 Magnesium Alloy 1113 Before salt spray test After salt spray test 1 V 3 mm 3 mm 4 µ m Fig. 8 Surface morphologies of anodic film formed on AZ31 magnesium alloy before and after salt spray test. 4. Conclusion The film formed at has a dark gray color with rough surface, it mainly consisted of magnesium hydroxide, and it was thicker than all those films formed at higher potential. On the other hand, the anodic film formed at 1 V has a smooth surface with a white color. It may be because the formation of a compact magnesium oxide film. The film formed at 1 V has the lowest hydrogen overpotential, and it has the best corrosion resistance in this work. Acknowledgement The authors thank Dr. Kuroda for his kind advice and guidance in carrying out this work. The financial assistance from The Ministry of Education, Culture, Sports, Science and Technology of Japan (Monbukagakusho) is gratefully acknowledged. REFERENCES 1) G. L. Song and A. Atrens: Adv. Eng. Mater. 1 (1999) ) M. Yekehtaz, K. Baba, R. Hatada, S. Flege, F. Sittner and W. Ensinger: Nucl. Inst. Methods Phys. Res., Section B 267 (29) ) S-J. Kim, Y. Zhou, R. Ichino, M. Okido and S. Tanikawa: Metal. Mater. Int. 9 (23) ) S-J. Kim and M. Okido: Bull. Korean Chem. Soc. 24 (23) ) H. Umehara, M. Takaya and Y. Kojima: J. Jpn. Inst. Light Met. 5 (2) ) S. A. Salman, R. Ichino and M. Okido: Proc. 8th Int. Conf. on Advanced Surface Engineering, Tokyo, (26) p ) S. A. Salman, R. Ichino and M. Okido: Surf. Eng. 24 (28) ) S. A. Salman, R. Ichino and M. Okido: Trans. Nonferr. Metal. Soc. China 19 (29) ) S. A. Salman, R. Ichino and M. Okido: Mater. Trans. 49 (28) ) Y. Mizutani, S. Kim, R. Ichino and M. Okido: Surf. Coat. Technol (23) ) G. L. Song and A. Atrens: Proc. 6th Int. Conf. Magnesium Alloys and Their Applications, (K U Kainer, Weinheim, Germany, 24) pp ) M. Laska, J. Valtyni and P. Feller: Cryst. Res. Technol. 28 (1993)

J. Mater. Sci. Technol., 2010, 26(11),

J. Mater. Sci. Technol., 2010, 26(11), J. Mater. Sci. Technol., 2010, 26(11), 1016-1020. Effects of Current Density on the Microstructure and the Corrosion Resistance of Alumina Coatings Embedded with SiC Nano-particles Produced by Micro-arc

More information

Improvement of corrosion resistance of HVOF thermal sprayed coatings by gas shroud

Improvement of corrosion resistance of HVOF thermal sprayed coatings by gas shroud Improvement of corrosion resistance of HVOF thermal sprayed coatings by gas shroud Jin Kawakita, Takeshi Fukushima, Seiji Kuroda, and Toshiaki Kodama National Research Institute for Materials Science Abstract

More information

THE RELATIONSHIP BETWEEN SURFACE TREATMENTS AND CORROSION RESISTANCE OF HOT-DIP GALVANIZED STEEL. Amirreza Bakhtiari

THE RELATIONSHIP BETWEEN SURFACE TREATMENTS AND CORROSION RESISTANCE OF HOT-DIP GALVANIZED STEEL. Amirreza Bakhtiari Association of Metallurgical Engineers of Serbia AMES Scientific paper UDC: 620.197.2:669.141; 620.193 THE RELATIONSHIP BETWEEN SURFACE TREATMENTS AND CORROSION RESISTANCE OF HOT-DIP GALVANIZED STEEL Amirreza

More information

DEVELOPMENT OF ELECTROLESS PROCESS FOR DEPOSITION OF ZN SILICATE COATINGS

DEVELOPMENT OF ELECTROLESS PROCESS FOR DEPOSITION OF ZN SILICATE COATINGS REPORT OF THE FINAL PROJECT ENTITLED: DEVELOPMENT OF ELECTROLESS PROCESS FOR DEPOSITION OF ZN SILICATE COATINGS by Veeraraghavan S Basker Department of Chemical Engineering University of South Carolina

More information

Sealing Mechanism of Anodic Porous Oxide Films Formed on Aluminum in Lithium Hydroxide Solution

Sealing Mechanism of Anodic Porous Oxide Films Formed on Aluminum in Lithium Hydroxide Solution Proceedings of the 12th International Conference on Aluminium Alloys, September 5-9, 2010, Yokohama, Japan 2010 The Japan Institute of Light Metals pp. 1463-1468 1463 Sealing Mechanism of Anodic Porous

More information

Corrosion Science 50 (2008) Contents lists available at ScienceDirect. Corrosion Science. journal homepage:

Corrosion Science 50 (2008) Contents lists available at ScienceDirect. Corrosion Science. journal homepage: Corrosion Science 5 (28) 3274 3279 Contents lists available at ScienceDirect Corrosion Science journal homepage: www.elsevier.com/locate/corsci Anodizing of magnesium alloy AZ31 in alkaline solutions with

More information

THE INFLUENCE OF ANODISING PARAMETERS ON THE CORROSION PERFORMANCE OF ANODISED COATINGS ON MAGNESIUM ALLOY AZ91D

THE INFLUENCE OF ANODISING PARAMETERS ON THE CORROSION PERFORMANCE OF ANODISED COATINGS ON MAGNESIUM ALLOY AZ91D THE INFLUENCE OF ANODISING PARAMETERS ON THE CORROSION PERFORMANCE OF ANODISED COATINGS ON MAGNESIUM ALLOY AZ91D Zhiming Shi, Guangling Song, and Andrej Atrens (CRC for Cast Metals Manufacturing (CAST),

More information

Formation mechanism of new corrosion resistance magnesium thin films by PVD method

Formation mechanism of new corrosion resistance magnesium thin films by PVD method Surface and Coatings Technology 169 170 (2003) 670 674 Formation mechanism of new corrosion resistance magnesium thin films by PVD method a, a a a b M.H. Lee *, I.Y. Bae, K.J. Kim, K.M. Moon, T. Oki a

More information

Improvement of anticorrosion and adhesion to magnesium alloy by phosphate coating formed at room temperature

Improvement of anticorrosion and adhesion to magnesium alloy by phosphate coating formed at room temperature Improvement of anticorrosion and adhesion to magnesium alloy by phosphate coating formed at room temperature NIU Li-yuan( ), LIN Ji-xing( ), LI Yong( ), SHI Zi-mu( ), XU Lin-chao( ) Advanced Material Research

More information

CHAPTER 2 MATERIALS AND METHODS

CHAPTER 2 MATERIALS AND METHODS 37 CHAPTER 2 MATERIALS AND METHODS This chapter discusses the methodology adopted for the development of zinc phosphate coating utilizing galvanic coupling and to evaluate the effect of cathode materials

More information

Characterization of Oxide Film Formed on Ck45 Steel by Plasma Electrolytic Oxidation Method

Characterization of Oxide Film Formed on Ck45 Steel by Plasma Electrolytic Oxidation Method Journal of Mechanical Research and Application ISSN: 2251-7383, eissn: 2251-7391 Vol. 4, No. 2, 2012, 57-61 Characterization of Oxide Film Formed on Ck45 Steel by Plasma Electrolytic Oxidation Method JMRA

More information

Friction and Wear Properties on AZ91D Magnesium Alloy Treated by Anodizing from Phosphate Electrolytic Solution* 1

Friction and Wear Properties on AZ91D Magnesium Alloy Treated by Anodizing from Phosphate Electrolytic Solution* 1 Materials Transactions, Vol. 52, No. 9 (2011) pp. 1752 to 1758 #2011 The Japan Institute of Light Metals Friction and Wear Properties on AZ91D Magnesium Alloy Treated by Anodizing from Phosphate Electrolytic

More information

Corrosion Rate Measurement on C-Steel

Corrosion Rate Measurement on C-Steel Measurements of corrosion rate on Carbon-steel using Electrochemical (potentiodynamic Polarization, EIS etc.) technique. Corrosion Rate Measurement on C-Steel Abdullah Al Ashraf 1. Introduction: The degradation

More information

The Composition of the Rare Earth Based Conversion Coating Formed on AZ91D Magnesium Alloy

The Composition of the Rare Earth Based Conversion Coating Formed on AZ91D Magnesium Alloy CORROSION SCIENCE AND TECHNOLOGY, Vol.17, No.1(2018), pp.1~5 pissn: 1598-6462 / eissn: 2288-6524 [Research Paper] DOI: https://doi.org/10.14773/cst.2018.17.1.1 The Composition of the Rare Earth Based Conversion

More information

Performance Evaluation of Zinc Deposited Mild Steel in Chloride Medium.

Performance Evaluation of Zinc Deposited Mild Steel in Chloride Medium. Int. J. Electrochem. Sci., 6 (2011) 3254-3263 International Journal of ELECTROCHEMICAL SCIENCE www.electrochemsci.org Performance Evaluation of Zinc Deposited Mild Steel in Chloride Medium. Popoola A.P.I

More information

Corrosion Resistance of Plasma-Anodized AZ91 Mg Alloy in the Electrolyte with/without Potassium Fluoride

Corrosion Resistance of Plasma-Anodized AZ91 Mg Alloy in the Electrolyte with/without Potassium Fluoride Materials Transactions, Vol. 5, No. 3 (29) pp. 671 to 678 #29 The Japan Institute of Metals EXPRESS REGULAR ARTICLE Corrosion Resistance of Plasma-Anodized AZ91 Mg Alloy in the Electrolyte with/without

More information

Electrochemical study on magnesium anodes in NaCl and CaSO 4 Mg(OH) 2 aqueous solutions

Electrochemical study on magnesium anodes in NaCl and CaSO 4 Mg(OH) 2 aqueous solutions Electrochimica Acta 51 (2006) 1820 1830 Electrochemical study on magnesium anodes in NaCl and CaSO 4 Mg(OH) 2 aqueous solutions Fidel Guadarrama-Muñoz a, Juan Mendoza-Flores a, Ruben Duran-Romero a, J.

More information

Galvanic corrosion evaluation of 6061 aluminum coupled to CVD coated stainless steel Elizabeth Sikora and Barbara Shaw 6/9/2016

Galvanic corrosion evaluation of 6061 aluminum coupled to CVD coated stainless steel Elizabeth Sikora and Barbara Shaw 6/9/2016 SHAW AND ASSOCIATES CONSULTING Galvanic corrosion evaluation of 6061 aluminum coupled to CVD coated stainless steel Elizabeth Sikora and Barbara Shaw 6/9/2016 Evaluation of galvanic corrosion of aluminum

More information

Microstructure and Corrosion Properties of Mg-xSn-5Al-1Zn (x ¼ 0, 1, 5 and 9 mass%) Alloys

Microstructure and Corrosion Properties of Mg-xSn-5Al-1Zn (x ¼ 0, 1, 5 and 9 mass%) Alloys Materials Transactions, Vol. 51, No. 3 (2010) pp. 472 to 476 #2010 The Japan Institute of Metals Microstructure and Corrosion Properties of Mg-xSn-5Al-1Zn (x ¼ 0, 1, 5 and 9 mass%) Alloys Kyung Chul Park

More information

Investigation of Stress Corrosion Cracking Behaviors of an AZ91 Magnesium Alloy in 0.1 kmol/m 3 Na 2 SO 4 Solution Using Slow Strain Rate Test

Investigation of Stress Corrosion Cracking Behaviors of an AZ91 Magnesium Alloy in 0.1 kmol/m 3 Na 2 SO 4 Solution Using Slow Strain Rate Test Materials Transactions, Vol. 49, No. 5 (2008) pp. 1052 to 1056 Special Issue on Platform Science and Technology for Advanced Magnesium Alloys, IV #2008 The Japan Institute of Metals Investigation of Stress

More information

Corrosion resistance of Au/Ni thin films coated stainless steel used for a PEFC separator

Corrosion resistance of Au/Ni thin films coated stainless steel used for a PEFC separator Materials Characterisation VI 217 Corrosion resistance of Au/Ni thin films coated stainless steel used for a PEFC separator Y. Kimura 1 & M. Hirano 2 1 Department of Environmental and Energy Chemistry,

More information

Lightweight Materials for Applications

Lightweight Materials for Applications Protection of Magnesium Alloys as Lightweight Materials for Applications in the Aerospace Industry Lénia M. Calado 1, Maryna Taryba 1, Maria J. Carmezim 1,2, M. Fátima Montemor 1 1 CQE, DEQ, Instituto

More information

Preparation of Trivalent Chromium Coating on 6063 Aluminum Alloy Jian-Zhen HUANG 1,a,* and You-Xiong LUO 1,b

Preparation of Trivalent Chromium Coating on 6063 Aluminum Alloy Jian-Zhen HUANG 1,a,* and You-Xiong LUO 1,b 2017 Joint International Conference on Materials Science and Engineering Application (ICMSEA 2017) and International Conference on Mechanics, Civil Engineering and Building Materials (MCEBM 2017) ISBN:

More information

Electrochemical study on magnesium anodes in NaCl and CaSO 4 Mg(OH) 2 aqueous solutions

Electrochemical study on magnesium anodes in NaCl and CaSO 4 Mg(OH) 2 aqueous solutions Electrochimica Acta xxx (2005) xxx xxx Electrochemical study on magnesium anodes in NaCl and CaSO 4 Mg(OH) 2 aqueous solutions Fidel Guadarrama-Muñoz a, Juan Mendoza-Flores a, Ruben Duran-Romero a, J.

More information

Corrosion of an aluminum alloy chilled in flowing seawater. and the effect of cathodic prevention

Corrosion of an aluminum alloy chilled in flowing seawater. and the effect of cathodic prevention Corrosion of an aluminum alloy chilled in flowing seawater and the effect of cathodic prevention Akihiro Yabuki *, David T. Yasunaga a, Toshihiro Shibutani b, Koichi Shinkai b * Graduate School of Engineering,

More information

Microstructure and Voltage Current Characteristics of Anodic Films Formed on Magnesium in Electrolytes Containing Fluoride* 1

Microstructure and Voltage Current Characteristics of Anodic Films Formed on Magnesium in Electrolytes Containing Fluoride* 1 Materials Transactions, Vol. 44, No. 4 (23) pp. 539 to 545 Special Issue on Platform Science and Technology for Advanced Magnesium Alloys, II #23 The Japan Institute of Metals Microstructure and Voltage

More information

CORROSION BEHAVIOUR OF TOMBAC USED IN CULT OBJECTS MANUFACTURING

CORROSION BEHAVIOUR OF TOMBAC USED IN CULT OBJECTS MANUFACTURING CORROSION BEHAVIOUR OF TOMBAC USED IN CULT OBJECTS MANUFACTURING P. HAGIOGLU 1, C. GHEORGHIES 3, A.M. CANTARAGIU 1, R. BOICIUC, N. TIGAU 3 1 Faculty of Mechanics, Dunarea de Jos University of Galati Arcelor

More information

Zn Ni alloy coatings pulse-plated on magnesium alloy

Zn Ni alloy coatings pulse-plated on magnesium alloy Surface & Coatings Technology 191 (2005) 393 399 www.elsevier.com/locate/surfcoat Zn Ni alloy coatings pulse-plated on magnesium alloy Y.F. Jiang*, C.Q. Zhai, L.F. Liu, Y.P. Zhu, W.J. Ding National Engineering

More information

Effect of Precorrosion and Temperature on the Formation Rate of Iron Carbonate Film

Effect of Precorrosion and Temperature on the Formation Rate of Iron Carbonate Film 7th Pipeline Technology Conference 2012 Effect of Precorrosion and Temperature on the Formation Rate of Iron Carbonate Film Winia Farida a,b, Tor Hemmingsen b, Tonje Berntsen b,c, Patrick Rabindran a a

More information

Laboratory Experiments in Corrosion Engineering II

Laboratory Experiments in Corrosion Engineering II Lecture - 40 Laboratory Experiments in Corrosion Engineering II Keywords: Polarization Experiments, Pitting Potentials, Microbial Corrosion. A. Electrochemical tests in a given environment Polarization

More information

on Electrochemical Etching of Pure Aluminium Foil for Aluminium Electrolytic Capacitor

on Electrochemical Etching of Pure Aluminium Foil for Aluminium Electrolytic Capacitor Volume 6 Paper C145 Effect of SO 4 2-, S 2 O 2-3 and HSO - 4 Ion Additives on Electrochemical Etching of Pure Aluminium Foil for Aluminium Electrolytic Capacitor S.-I. Pyun and K.-H. Na Dept. Mat. Sci.

More information

An XPS and Atomic Force Microscopy Study of the Micro-Wetting Behavior of Water on Pure Chromium* 1

An XPS and Atomic Force Microscopy Study of the Micro-Wetting Behavior of Water on Pure Chromium* 1 Materials Transactions, Vol. 44, No. 3 (2003) pp. 389 to 395 #2003 The Japan Institute of Metals An XPS and Atomic Force Microscopy Study of the Micro-Wetting Behavior of Water on Pure Chromium* 1 Rongguang

More information

CORROSION PROPERTIES OF CERMET COATINGS SPRAYED BY HIGH-VELOCITY OXYGEN-FUEL. Dragos UŢU, Iosif HULKA, Viorel-Aurel ŞERBAN, Hannelore FILIPESCU

CORROSION PROPERTIES OF CERMET COATINGS SPRAYED BY HIGH-VELOCITY OXYGEN-FUEL. Dragos UŢU, Iosif HULKA, Viorel-Aurel ŞERBAN, Hannelore FILIPESCU Abstract CORROSION PROPERTIES OF CERMET COATINGS SPRAYED BY HIGH-VELOCITY OXYGEN-FUEL Dragos UŢU, Iosif HULKA, Viorel-Aurel ŞERBAN, Hannelore FILIPESCU Politehnica University of Timisoara, Romania, dragosutu@yahoo.com,

More information

Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe Mn Si Cr) in a High Chloride Environment

Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe Mn Si Cr) in a High Chloride Environment , pp. 1913 1919 Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe Mn Si Cr) in a High Chloride Environment Toshiyasu NISHIMURA* National Institute for Materials Science (NIMS),

More information

Leena Das and Der-Tau Chin Department of Chemical Engineering, Clarkson University Potsdam, New York

Leena Das and Der-Tau Chin Department of Chemical Engineering, Clarkson University Potsdam, New York EFFECT OF MICROSTRUCTURE OF FERROUS SUBSTRATE ON POROSITY OF ELECTROLESS NICKEL COATING Leena Das and Der-Tau Chin Department of Chemical Engineering, Clarkson University Potsdam, New York 13699-575 1

More information

Alkaline Rechargeable Ni/Co Batteries: Cobalt Hydroxides as. Negative Electrode Materials

Alkaline Rechargeable Ni/Co Batteries: Cobalt Hydroxides as. Negative Electrode Materials Supplementary Information: Alkaline Rechargeable Ni/Co Batteries: Cobalt Hydroxides as Negative Electrode Materials X. P. Gao, S. M. Yao, T. Y. Yan, Z. Zhou Institute of New Energy Material Chemistry,

More information

Yajuan Liu a, Jinyong Xu a, Ying Gao b, Ye Yuan b, Cheng Gao a

Yajuan Liu a, Jinyong Xu a, Ying Gao b, Ye Yuan b, Cheng Gao a Available online at www.sciencedirect.com Physics Procedia 32 (2012 ) 107 112 18 th International Vacuum Congress (IVC-18) Influences of Additive on the Formation and Corrosion Resistance of Micro-arc

More information

Stability of Surface Films Formed on Mg by Exposure Aqueous Solutions

Stability of Surface Films Formed on Mg by Exposure Aqueous Solutions Stability of Surface Films Formed on Mg by Exposure Aqueous Solutions By: Mehdi Taheri Supervisor: Dr. Joseph Kish Walter W. Smeltzer Corrosion Lab McMaster University 1 2 nd MSE 702 Graduate Seminar Sept

More information

INFLUENCE OF FRICTION STIR WELDING ON CORROSION PROPERTIES OF AW-7020M ALLOY IN SEA WATER

INFLUENCE OF FRICTION STIR WELDING ON CORROSION PROPERTIES OF AW-7020M ALLOY IN SEA WATER DOI: 10.1515/adms-2015-0002 K. Dudzik 1, W. Jurczak 2 1 Gdynia Maritime University, Faculty of Marine Engineering, Marine Maintenance Department, Gdynia, Poland 2 Polish Naval Academy, Mechanical Electrical

More information

Enhanced corrosion protection of magnesium oxide coatings on magnesium deposited by ion beam-assisted evaporation

Enhanced corrosion protection of magnesium oxide coatings on magnesium deposited by ion beam-assisted evaporation Surface and Coatings Technology 103 104 (1998) 29 35 Enhanced corrosion protection of magnesium oxide coatings on magnesium deposited by ion beam-assisted evaporation F. Stippich a,*, E. Vera a, G.K. Wolf

More information

Electrodeposition and Properties of ZnFeNi Alloys. Ismail Hakki Karahan

Electrodeposition and Properties of ZnFeNi Alloys. Ismail Hakki Karahan CHINESE JOURNAL OF PHYSICS VOL. 46, NO. 1 FEBRUARY 2008 Electrodeposition and Properties of ZnFeNi Alloys Ismail Hakki Karahan Department of Physics, Faculty of Science and Arts, Kilis 7 Aralik Universty,

More information

Corrosion behavior of Al Si Cu (Sn, Zn) brazing filler metals

Corrosion behavior of Al Si Cu (Sn, Zn) brazing filler metals Materials Characterization 47 (2001) 401 409 Corrosion behavior of Al Si Cu (Sn, Zn) brazing filler metals S.S. Wang, M.D. Cheng, L.C. Tsao, T.H. Chuang* Institute of Materials Science and Engineering,

More information

Improved corrosion resistance of AZ91D magnesium alloy by an aluminium-alloyed coating

Improved corrosion resistance of AZ91D magnesium alloy by an aluminium-alloyed coating Surface & Coatings Technology 200 (2006) 2834 2840 www.elsevier.com/locate/surfcoat Improved corrosion resistance of AZ91D magnesium alloy by an aluminium-alloyed Liqun Zhu a, Guangling Song b, a Department

More information

Studies on electrodeposited Zn-Fe alloy coating on mild steel and its characterization

Studies on electrodeposited Zn-Fe alloy coating on mild steel and its characterization J. Electrochem. Sci. Eng. 9(1) (2019) 9-16; DOI: http://dx.doi.org/10.5599/jese.565 Original scientific paper Open Access: ISSN 1847-9286 www.jese-online.org Studies on electrodeposited Zn-Fe alloy coating

More information

Seeing is Believing. - Nanostructure of Anodic Alumina Film - The International Hard Anodizing Association 15th Technical Symposium

Seeing is Believing. - Nanostructure of Anodic Alumina Film - The International Hard Anodizing Association 15th Technical Symposium Seeing is Believing - Nanostructure of Anodic Alumina Film - The International Hard Anodizing Association 15th Technical Symposium September 24-26, 2014 Sheraton Lincoln Harbor Hotel, Weehawken, NJ Sachiko

More information

Mechanism of Corrosion Protection of Anodized Magnesium Alloys

Mechanism of Corrosion Protection of Anodized Magnesium Alloys Materials Transactions, Vol. 49, No. 5 (2008) pp. 1057 to 1064 Special Issue on Platform Science and Technology for Advanced Magnesium Alloys, IV #2008 The Japan Institute of Metals Mechanism of Corrosion

More information

Simulation of galvanic corrosion of magnesium coupled to a steel fastener in NaCl solution

Simulation of galvanic corrosion of magnesium coupled to a steel fastener in NaCl solution 468 Jia, Atrens, Song and Muster Materials and Corrosion 2005, 56, No. 7 Simulation of galvanic corrosion of magnesium coupled to a steel fastener in NaCl solution J. X. Jia, A. Atrens*, G. Song and T.

More information

CORROSION RESISTANCE OF PLASMA NITRIDED AND NITROCARBURIZED AISI 316L AUSTENITIC STAINLESS STEEL

CORROSION RESISTANCE OF PLASMA NITRIDED AND NITROCARBURIZED AISI 316L AUSTENITIC STAINLESS STEEL CORROSION RESISTANCE OF PLASMA NITRIDED AND NITROCARBURIZED AISI 316L AUSTENITIC STAINLESS STEEL F.A.P. Fernandes 1*, J. Gallego 2, G.E. Totten 3, C.A. Picon 2, L.C. Casteletti 1 1 Department of Materials

More information

Influences of current density on structure and corrosion resistance of ceramic coatings on Ti 6Al 4V alloy by micro-plasma oxidation

Influences of current density on structure and corrosion resistance of ceramic coatings on Ti 6Al 4V alloy by micro-plasma oxidation Thin Solid Films 468 (2004) 120 124 www.elsevier.com/locate/tsf Influences of current density on structure and corrosion resistance of ceramic coatings on Ti 6Al 4V alloy by micro-plasma oxidation Zhongping

More information

Investigation of Formation Process of the Chrome-free Passivation Film of Electrodeposited Zinc

Investigation of Formation Process of the Chrome-free Passivation Film of Electrodeposited Zinc Chinese Journal of Aeronautics 20(2007) 129-133 Chinese Journal of Aeronautics www.elsevier.com/locate/cja Investigation of Formation Process of the Chrome-free Passivation Film of Electrodeposited Zinc

More information

Rapid electroplating of Cu coatings by mechanical attrition method

Rapid electroplating of Cu coatings by mechanical attrition method Rapid electroplating of Cu coatings by mechanical attrition method NING Zhao-hui( 宁朝晖 ), HE Ye-dong( 何业东 ) Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, University of Science and

More information

The electrodeposition of Zn-Mo and Zn-Sn-Mo alloys from citrate electrolytes

The electrodeposition of Zn-Mo and Zn-Sn-Mo alloys from citrate electrolytes Honorata Kazimierczak The electrodeposition of Zn-Mo and Zn-Sn-Mo alloys from citrate electrolytes Supervisor: Assoc. Prof. Piotr Ozga The electrodeposition of Zn-Mo and Zn-Sn-Mo alloys from citrate electrolytes

More information

CORROSION PROTECTION OF MRI230D MAGNESIUM ALLOY BY THE PLASMA ELECTROLYTIC OXIDATION

CORROSION PROTECTION OF MRI230D MAGNESIUM ALLOY BY THE PLASMA ELECTROLYTIC OXIDATION CORROSION PROTECTION OF MRI230D MAGNESIUM ALLOY BY THE PLASMA ELECTROLYTIC OXIDATION Barbara Kazanski Traubin, Alex Lugovskoy *, Michael Zinigrad Department of Chemical Engineering, Ariel University, Ariel

More information

COMPARATIVE STUDY ON THE CORROSION RESISTANCE OF Zn- 0.2 Pb AND Zn-0.5 Sb GALVANIZED COATINGS. A. Bakhtiari 1, H.R. Asgari 2.

COMPARATIVE STUDY ON THE CORROSION RESISTANCE OF Zn- 0.2 Pb AND Zn-0.5 Sb GALVANIZED COATINGS. A. Bakhtiari 1, H.R. Asgari 2. Association of Metallurgical Engineers of Serbia AMES Scientific paper UDC: 620.193/.197 ; 621.793/.795 ; 667.6 COMPARATIVE STUDY ON THE CORROSION RESISTANCE OF Zn- 0.2 Pb AND Zn-0.5 Sb GALVANIZED COATINGS

More information

EFFECTS OF CURRENT DENSITY ON SIZE AND SURFACE MORPHOLOGY OF HIGH SPEED DIRECT NANO-CRYSTALLINE NICKEL PLATING ON TITANIUM SURFACE

EFFECTS OF CURRENT DENSITY ON SIZE AND SURFACE MORPHOLOGY OF HIGH SPEED DIRECT NANO-CRYSTALLINE NICKEL PLATING ON TITANIUM SURFACE EFFECTS OF CURRENT DENSITY ON SIZE AND SURFACE MORPHOLOGY OF HIGH SPEED DIRECT NANO-CRYSTALLINE NICKEL PLATING ON TITANIUM SURFACE Noor Zaimah 1, Azieyanti Nurain 1 and Sakhawat Hussain 2 1 Department

More information

EFFECTS OF A SMALL ADDITION OF MN ON MODIFYING THE COATING THICKNESS, STRUCTURE AND CORROSION RESISTANCE OF HOT-DIP GALVANIZED COATINGS

EFFECTS OF A SMALL ADDITION OF MN ON MODIFYING THE COATING THICKNESS, STRUCTURE AND CORROSION RESISTANCE OF HOT-DIP GALVANIZED COATINGS Association of Metallurgical Engineers of Serbia AMES Scientific paper UDC: 620.193/.197 ; 621.793/.795 ; 667.6 EFFECTS OF A SMALL ADDITION OF MN ON MODIFYING THE COATING THICKNESS, STRUCTURE AND CORROSION

More information

Kinetic Characteristics of Different Materials used for Bolting Applications

Kinetic Characteristics of Different Materials used for Bolting Applications Kinetic Characteristics of Different Materials used for Bolting Applications Report Kinetic Characteristics of Different Materials used for Bolting Applications Overview One of the most common problems

More information

EFFECTS OF DIFFERENT ELECTROLYTE SYSTEMS ON THE FORMATION OF MICRO-ARC OXIDATION CERAMIC COATINGS OF 6061 ALUMINUM ALLOY

EFFECTS OF DIFFERENT ELECTROLYTE SYSTEMS ON THE FORMATION OF MICRO-ARC OXIDATION CERAMIC COATINGS OF 6061 ALUMINUM ALLOY 16 Rev. Adv. Mater. Sci. (01) 16-10 Y.J. Liu, EFFECTS OF DIFFERENT ELECTROLYTE SYSTEMS ON THE FORMATION OF MICRO-ARC OXIDATION CERAMIC COATINGS OF 6061 ALUMINUM ALLOY Y.J. Liu 1, J.Y. Xu1, W. Lin, C. Gao

More information

Evaluation of Corrosion Resistance of Anodized Aluminum by Polarization Resistance Method

Evaluation of Corrosion Resistance of Anodized Aluminum by Polarization Resistance Method Technical Paper Boshoku Gijutsu, 34,265-269 (1981) UDC 669.716.9:620.19 541.135.6 Evaluation of Corrosion Resistance of Anodized Aluminum by Polarization Resistance Method Phan Trung Thanh*, Akiyane Akiyama*

More information

Effect of phosphate coatings on the performance of epoxy polyamide red oxide primer on galvanized steel

Effect of phosphate coatings on the performance of epoxy polyamide red oxide primer on galvanized steel Progress in Organic Coatings 54 (2005) 5 9 Effect of phosphate coatings on the performance of epoxy polyamide red oxide primer on galvanized steel S. Palraj, M. Selvaraj, P. Jayakrishnan Corrosion Science

More information

The Effect of Nickel Ion on the Morphology and Adhesion Properties of Zinc Phosphate Coating

The Effect of Nickel Ion on the Morphology and Adhesion Properties of Zinc Phosphate Coating The Effect of Nickel Ion on the Morphology and Adhesion Properties of Zinc Phosphate Coating H Zarei 1 and R Hosseini Rad 2* 1 Graduate Center, Department of Materials Engineering, Shahid Sattari Aeronautical

More information

Selective Dissolution Characteristics of 26Cr-7Ni-2.5Mo-3W Duplex Stainless Steel in H 2 SO 4 /HCl Mixed Solution

Selective Dissolution Characteristics of 26Cr-7Ni-2.5Mo-3W Duplex Stainless Steel in H 2 SO 4 /HCl Mixed Solution Materials Transactions, Vol. 50, No. 5 (2009) pp. 1214 to 1218 #2009 The Japan Institute of Metals EXPRESS REGULAR ARTICLE Selective Dissolution Characteristics of 26Cr-7Ni-2.5Mo-3W Duplex Stainless Steel

More information

Influence of Spraying Conditions on Properties of Zr-Based Metallic Glass Coating by Gas Tunnel Type Plasma Spraying

Influence of Spraying Conditions on Properties of Zr-Based Metallic Glass Coating by Gas Tunnel Type Plasma Spraying Influence of Spraying Conditions on Properties of Zr-Based Metallic Glass by Gas Tunnel Type Plasma Spraying KOBAYASHI Akira *, KURODA Toshio *, KIMURA Hisamichi ** and INOUE Akihisa ** Abstract Metallic

More information

Electrochemical corrosion behavior of Ni-containing hypoeutectic Al-Si alloy

Electrochemical corrosion behavior of Ni-containing hypoeutectic Al-Si alloy J. Electrochem. Sci. Eng. X(Y) (2015) 173-179; doi: 10.5599/jese.174 Original scientific paper Open Access : : ISSN 1847-9286 www.jese-online.org Electrochemical corrosion behavior of Ni-containing hypoeutectic

More information

Corrosion Resistance Improvement of Galvanised Steel by Doped Silane Pre-Treatments

Corrosion Resistance Improvement of Galvanised Steel by Doped Silane Pre-Treatments 2015 2 nd International Conference on Material Engineering and Application (ICMEA 2015) ISBN: 978-1-60595-323-6 Corrosion Resistance Improvement of Galvanised Steel by Doped Silane Pre-Treatments J.F.

More information

Effect of Continuous Rotation Evolutional Control on the Pitting Corrosion Resistance of Anodized Aluminum-Magnesium Alloy* 1

Effect of Continuous Rotation Evolutional Control on the Pitting Corrosion Resistance of Anodized Aluminum-Magnesium Alloy* 1 Materials Transactions, Vol. 5, No. 8 (29) pp. 1985 to 1991 #29 The Japan Institute of Metals Effect of Continuous Rotation Evolutional Control on the Pitting Corrosion Resistance of Anodized Aluminum-Magnesium

More information

IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS

IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Influence of anodizing concentration and electric potential on surface morphology and corrosion behavior of anodized magnesium in

More information

Corrosion Protect DLC Coating on Steel and Hastelloy

Corrosion Protect DLC Coating on Steel and Hastelloy Materials Transactions, Vol. 49, No. 6 (2008) pp. 1333 to 1337 #2008 The Japan Institute of Metals Corrosion Protect DLC Coating on Steel and Hastelloy Hironobu Miya and Jie Wang Semiconductor Equipment

More information

Preparation and characterization of thin electrodes for lead acid batteries

Preparation and characterization of thin electrodes for lead acid batteries Journal of Power Sources 113 (2003) 376 381 Preparation and characterization of thin electrodes for lead acid batteries A. Caballero, M. Cruz, L. Hernán, J. Morales *,L.Sánchez Departamento de Química

More information

Crack Initiation and Crack Propagation of Pre-corroded Ni-16Cr Alloy in 4.5%NaCl Aqueous Solution

Crack Initiation and Crack Propagation of Pre-corroded Ni-16Cr Alloy in 4.5%NaCl Aqueous Solution IOSR Journal of Engineering (IOSRJEN) e-issn: 2250-3021, p-issn: 2278-8719 Vol. 3, Issue 8 (August. 2013), V2 PP 11-15 Crack Initiation and Crack Propagation of Pre-corroded Ni-16Cr Alloy in 4.5%NaCl Aqueous

More information

Corrosion Behavior of Cu Zr Ti Nb Bulk Glassy Alloys

Corrosion Behavior of Cu Zr Ti Nb Bulk Glassy Alloys Materials Transactions, Vol. 44, No. 4 (3 pp. 749 to 753 #3 The Japan Institute of Metals Corrosion Behavior of Cu Bulk Glassy Alloys Chunling Qin 1; *, Katsuhiko Asami 1, Tao Zhang 1, Wei Zhang 2 and

More information

Pulsed Electrodeposited Nickel Cerium for Hydrogen Production Studies 54

Pulsed Electrodeposited Nickel Cerium for Hydrogen Production Studies 54 Pulsed Electrodeposited Nickel Cerium for Hydrogen Production Studies 54 T. Sivaranjani 1, T.A. Revathy 1, K. Dhanapal 1, V. Narayanan 2, A. Stephen 1,a 1 Materials Science Centre, Department of Nuclear

More information

Synthesis, Characterization and Optical Properties of ZnS Thin Films

Synthesis, Characterization and Optical Properties of ZnS Thin Films Synthesis, Characterization and Optical Properties of ZnS Thin Films H. R. Kulkarni KJ College of Engineering and Management Research, Pune, India Abstract: ZnS thin films were prepared by pulsed electrodeposition

More information

FORMATION OF TiO 2 THIN FILM BY ION-BEAM-MIXING METHOD AND ITS APPLICATION AS THE CORROSION PROTECTING FILM

FORMATION OF TiO 2 THIN FILM BY ION-BEAM-MIXING METHOD AND ITS APPLICATION AS THE CORROSION PROTECTING FILM ORAL REFERENCE:ICF100266OR FORMATION OF TiO 2 THIN FILM BY ION-BEAM-MIXING METHOD AND ITS APPLICATION AS THE CORROSION PROTECTING FILM Yuji KIMURA 1 and Hirotsugu SAITO 1 1 Dept. of Materials Science and

More information

Formation of Corrosion Resistant Mg(OH) 2 Film Containing Mg-Al Layered Double Hydroxide on Mg Alloy Using Steam Coating

Formation of Corrosion Resistant Mg(OH) 2 Film Containing Mg-Al Layered Double Hydroxide on Mg Alloy Using Steam Coating 2017 International Conference on Mechanical and Mechatronics Engineering (ICMME 2017) ISBN: 978-1-60595-440-0 Formation of Corrosion Resistant Mg(OH) 2 Film Containing Mg-Al Layered Double Hydroxide on

More information

Improvement of Corrosion Resistance and Adhesion of Coating Layer for Magnesium Alloy Coated with High Purity Magnesium

Improvement of Corrosion Resistance and Adhesion of Coating Layer for Magnesium Alloy Coated with High Purity Magnesium Materials Transactions, Vol. 44, No. 4 (2003) pp. 518 to 523 Special Issue on Platform Science and Technology for Advanced Magnesium Alloys, II #2003 The Japan Institute of Metals Improvement of Corrosion

More information

Influence of Al Content on the Atmospheric Corrosion Behaviour of Magnesium-Aluminum Alloys

Influence of Al Content on the Atmospheric Corrosion Behaviour of Magnesium-Aluminum Alloys J. Mater. Sci. Technol., Vol.25 No.2, 2009 225 Influence of Al Content on the Atmospheric Corrosion Behaviour of Magnesium-Aluminum Alloys Ruiling Jia 1,3), Chuanwei Yan 2) and Fuhui Wang 1,2) 1) College

More information

What happens if we connect Zn and Pt in HCl solution? Corrosion of platinum (Pt) in HCl. 1. If Zn and Pt are not connected

What happens if we connect Zn and Pt in HCl solution? Corrosion of platinum (Pt) in HCl. 1. If Zn and Pt are not connected Corrosion of platinum (Pt) in HCl Now if we place a piece of Pt in HCl, what will happen? Pt does not corrode does not take part in the electrochemical reaction Pt is a noble metal Pt acts as a reference

More information

Supporting information

Supporting information Supporting information Cu 2 O-Cu Hybrid Foams as High-Performance Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media Han Xu, Jin-Xian Feng, Ye-Xiang Tong, and Gao-Ren Li* MOE Laboratory of

More information

Effects of Bath Temperature on Electrodeposited Permanent Magnetic Co-Pt-W(P) Films

Effects of Bath Temperature on Electrodeposited Permanent Magnetic Co-Pt-W(P) Films 2214 Bull. Korean Chem. Soc. 2007, Vol. 28, No. 12 Hongliang Ge et al. Effects of Bath Temperature on Electrodeposited Permanent Magnetic Co-Pt-W(P) Films Hongliang Ge, * Qiong Wu, Guoying Wei, Xinyan

More information

School of Materials Science and Engineering, South China University of Technology,

School of Materials Science and Engineering, South China University of Technology, Supporting information Zn/MnO 2 Battery Chemistry With H + and Zn 2+ Co-Insertion Wei Sun, Fei Wang, Singyuk Hou, Chongyin Yang, Xiulin Fan, Zhaohui Ma, Tao Gao, Fudong Han, Renzong Hu, Min Zhu *, Chunsheng

More information

Hydrogen Permeation of Pipeline Steel under Sour Condensate Film Condition

Hydrogen Permeation of Pipeline Steel under Sour Condensate Film Condition Hydrogen Permeation of Pipeline Steel under Sour Condensate Film Condition Zhaoyang Cui, Lei Zhang, Yanni Sun, Rufei Ma, Mingliang Liu and Minxu Lu Institute of Advanced Materials and Technology, University

More information

ELECTROCHEMICAL SYNTHESIS OF POLYPYRROLE (PPy) and PPy METAL COMPOSITES ON COPPER and INVESTIGATION OF THEIR ANTICORROSIVE PROPERTIES

ELECTROCHEMICAL SYNTHESIS OF POLYPYRROLE (PPy) and PPy METAL COMPOSITES ON COPPER and INVESTIGATION OF THEIR ANTICORROSIVE PROPERTIES ELECTROCHEMICAL SYNTHESIS OF POLYPYRROLE (PPy) and PPy METAL COMPOSITES ON COPPER and INVESTIGATION OF THEIR ANTICORROSIVE PROPERTIES Sibel Zor, Hatice Özkazanç Kocaeli University, Department of Chemistry,

More information

METAL FINISHING. (As per revised VTU syllabus: )

METAL FINISHING. (As per revised VTU syllabus: ) METAL FINISHING (As per revised VTU syllabus: 2015-16) Definition: It is a process in which a specimen metal (article) is coated with another metal or a polymer in order to modify the surface properties

More information

The influence of Mg 17 Al 12 phase volume fraction on the corrosion behaviour of AZ91 magnesium alloy. Andrzej Kiełbus* and Grzegorz Moskal

The influence of Mg 17 Al 12 phase volume fraction on the corrosion behaviour of AZ91 magnesium alloy. Andrzej Kiełbus* and Grzegorz Moskal 196 Int. J. Microstructure and Materials Properties, Vol. 4, No. 2, 2009 The influence of Mg 17 Al 12 phase volume fraction on the corrosion behaviour of AZ91 magnesium alloy Andrzej Kiełbus* and Grzegorz

More information

Remarkable Reinforcement Effect in Sulfonated. Aromatic Polymers as Fuel Cell Membrane

Remarkable Reinforcement Effect in Sulfonated. Aromatic Polymers as Fuel Cell Membrane Supporting Information Remarkable Reinforcement Effect in Sulfonated Aromatic Polymers as Fuel Cell Membrane Junpei Miyake, Masato Kusakabe, Akihiro Tsutsumida, and Kenji Miyatake*,, Clean Energy Research

More information

Three-dimensional NiFe Layered Double Hydroxide Film for Highefficiency

Three-dimensional NiFe Layered Double Hydroxide Film for Highefficiency Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Three-dimensional NiFe Layered Double Hydroxide Film for Highefficiency Oxygen Evolution Reaction

More information

Supporting Information. on Degradation of Dye. Chengsi Pan and Yongfa Zhu* Department of Chemistry, Tsinghua University, Beijing, , China

Supporting Information. on Degradation of Dye. Chengsi Pan and Yongfa Zhu* Department of Chemistry, Tsinghua University, Beijing, , China Supporting Information A New Type of BiPO 4 Oxy-acid Salt Photocatalyst with High Photocatalytic Activity on Degradation of Dye Chengsi Pan and Yongfa Zhu* Department of Chemistry, Tsinghua University,

More information

Effect of soil compositions on the electrochemical corrosion behavior of carbon steel in simulated soil solution

Effect of soil compositions on the electrochemical corrosion behavior of carbon steel in simulated soil solution 228 DOI 10.1002/mawe.201000578 Mat.-wiss. u. Werkstofftech. 2010, 41, No. 4 behavior of carbon steel in simulated soil solution Einfluss der Erdbodenzusammensetzung auf das elektrochemische Verhalten von

More information

Influence of Silicon on Intergranular Corrosion for Aluminum Alloy*

Influence of Silicon on Intergranular Corrosion for Aluminum Alloy* UACJ Technical Reports, Vol.1 21 pp. 8-16 論 文 Influence of Silicon on Intergranular Corrosion for Aluminum Alloy* Yoshiyuki Oya** and Yoichi Kojima** An alternative fluorocarbon refrigerant of a heat exchanger

More information

The Effect of Calcium Nitrite on the Electrochemical Characterization of 3003 Aluminum Alloys in Sea Water. H.Mogawer and R.Brown

The Effect of Calcium Nitrite on the Electrochemical Characterization of 3003 Aluminum Alloys in Sea Water. H.Mogawer and R.Brown The Effect of Calcium Nitrite on the Electrochemical Characterization of 3003 Aluminum Alloys in Sea Water H.Mogawer and R.Brown Department of Chemical Engineering, University of Rhode Island, Kingston,

More information

Formation of Phosphate/Permanganate Conversion Coating on AZ31 Magnesium Alloy

Formation of Phosphate/Permanganate Conversion Coating on AZ31 Magnesium Alloy B90 0013-4651/2006/153 3 /B90/7/$20.00 The Electrochemical Society Formation of Phosphate/Permanganate Conversion Coating on AZ31 Magnesium Alloy C. S. Lin, a, *,z C. Y. Lee, b W. C. Li, a Y. S. Chen,

More information

Supporting Information. Hematite photoanode with gradient structure shows an unprecedentedly low onset

Supporting Information. Hematite photoanode with gradient structure shows an unprecedentedly low onset Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is the Owner Societies 2014 Supporting Information Hematite photoanode with gradient structure shows an unprecedentedly

More information

Accepted Manuscript. Corrosion mechanism and evaluation of anodized magnesium alloys. Guang-Ling Song, Zhiming Shi

Accepted Manuscript. Corrosion mechanism and evaluation of anodized magnesium alloys. Guang-Ling Song, Zhiming Shi Accepted Manuscript Corrosion mechanism and evaluation of anodized magnesium alloys Guang-Ling Song, Zhiming Shi PII: S0010-938X(14)00168-1 DOI: http://dx.doi.org/10.1016/j.corsci.2014.04.008 Reference:

More information

PREPARATION OF NEODYMIUM HYDROXIDE NANORODS AND NEODYMIUM OXIDE NANORODS BY A HYDROTHERMAL METHOD

PREPARATION OF NEODYMIUM HYDROXIDE NANORODS AND NEODYMIUM OXIDE NANORODS BY A HYDROTHERMAL METHOD Digest Journal of Nanomaterials and Biostructures Vol. 10, No. 2, April - June 2015, p. 715-719 PREPARATION OF NEODYMIUM HYDROXIDE NANORODS AND NEODYMIUM OXIDE NANORODS BY A HYDROTHERMAL METHOD N. EKTHAMMATHAT

More information

Supporting information

Supporting information Electronic Supplementary Material (ESI) for Nanoscale. This journal is The Royal Society of Chemistry 2018 Supporting information An amorphous material with sponge-like structure as anode for Liion and

More information

Aluminizing and oxidation treatment of 1Cr18Ni9 stainless steel

Aluminizing and oxidation treatment of 1Cr18Ni9 stainless steel Applied Surface Science 227 (2004) 255 260 Aluminizing and oxidation treatment of 1Cr18Ni9 stainless steel Deqing Wang *, Ziyuan Shi Department of Materials Science and Engineering, Dalian Railway Institute,

More information

Preparation and characterizations of new coatings based on PTFE-anodic films for the improvement of the tribological behavior of aluminum substrate

Preparation and characterizations of new coatings based on PTFE-anodic films for the improvement of the tribological behavior of aluminum substrate Preparation and characterizations of new coatings based on PTFE-anodic films for the improvement of the tribological behavior of aluminum substrate L. ARURAULT, J. ESCOBAR, V. TURQ, P-L. TABERNA IHAA 2014

More information

Transactions on Engineering Sciences vol 13, 1996 WIT Press, ISSN

Transactions on Engineering Sciences vol 13, 1996 WIT Press,  ISSN Improvement in corrosion resistance of CrN coating steel with multi-stage deposition method and its corrosion fatigue strength M. Sonobe, K. Shiozawa, K. Motobayashi Department of Mechanical Systems Engineering,

More information

Dunarea de Jos University of Galati, 47 Domneasca Street, Galati, ROMANIA,

Dunarea de Jos University of Galati, 47 Domneasca Street, Galati, ROMANIA, SURFACE TREATMENT OF IRON- BASED SINTERED COMPACTS FOR CORROSION PROTECTION POTECASU Florentina, RADU Tamara, POTECASU Octavian, MARIN Mihaela, CIOCAN Anisoara Dunarea de Jos University of Galati, 47 Domneasca

More information