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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Supporting Information

Supporting Information Supporting Information Low-Temperature Molten-Salt Production of Silicon Nanowires by the Electrochemical Reduction of CaSiO 3 Yifan Dong, Tyler Slade, Matthew J. Stolt, Linsen Li, Steven N. Girard, Liqiang

More information

2. Wet Corrosion: Characteristics, Prevention and Corrosion Rate

2. Wet Corrosion: Characteristics, Prevention and Corrosion Rate 2. Wet Corrosion: Characteristics, Prevention and Corrosion Rate Mighty ships upon the ocean suffer from severe corrosion. Even those that stay at dockside are rapidly becoming oxide Alas, that piling

More information

STAINLESS STEEL SELECTION FOR FLUE GAS DESULFURIZATION EQUIPMENT

STAINLESS STEEL SELECTION FOR FLUE GAS DESULFURIZATION EQUIPMENT STAINLESS STEEL SELECTION FOR FLUE GAS DESULFURIZATION EQUIPMENT Gary M. Carinci William A. Pratt Outokumpu Stainless 3209 McKnight East Drive Pittsburgh, Pennsylvania 15237 gcarinci@tmr-inc.com Abstract

More information

Tutorial Corrosion II. Electrochemical characterization with EC-Lab techniques

Tutorial Corrosion II. Electrochemical characterization with EC-Lab techniques Tutorial Corrosion II Electrochemical characterization with EC-Lab techniques 1 OUTLINE 1. Introduction 2. Types of corrosion a) Uniform corrosion b) Localized corrosion 3. Corrosion experiment 4. EC-Lab

More information

Corrosion and inhibition of Cu-Zn alloys in NaCl solution by using permanganate and phosphate anions

Corrosion and inhibition of Cu-Zn alloys in NaCl solution by using permanganate and phosphate anions Int. J. Electrochem. Sci., 2 (2007) 563-571 www.electrochemsci.org Corrosion and inhibition of Cu-Zn alloys in NaCl solution by using permanganate and phosphate anions S. A. M. Refaey 1, *, A. M. Abd El

More information

Titanium-Aluminum Oxide Coating on Aluminized Steel Fuyan Sun, Guang Wang, Xueyuan Nie

Titanium-Aluminum Oxide Coating on Aluminized Steel Fuyan Sun, Guang Wang, Xueyuan Nie Titanium-Aluminum Oxide Coating on Aluminized Steel Fuyan Sun, Guang Wang, Xueyuan Nie Abstract In this study, a plasma electrolytic oxidation (PEO) process was used to form titanium-aluminum oxide coating

More information

Electrolytic deposition of Zn-Mn-Mo alloys from a citrate bath

Electrolytic deposition of Zn-Mn-Mo alloys from a citrate bath Indian Journal of Chemical Technology Vol. 17, September 2010, pp. 381-385 Electrolytic deposition of Zn-Mn-Mo alloys from a citrate bath Renu Rastogi* & Archana Pandey Department of Chemistry, Brahmanand

More information

EMA4303/5305 Electrochemical Engineering Lecture 05 Applications (1)

EMA4303/5305 Electrochemical Engineering Lecture 05 Applications (1) EMA4303/5305 Electrochemical Engineering Lecture 05 Applications (1) Prof. Zhe Cheng Mechanical & Materials Engineering Florida International University Corrosion Definition Electrochemical attack of metals

More information

Influence of Conversion Coating on Magnesium and Aluminum Alloys by Adhesion Method

Influence of Conversion Coating on Magnesium and Aluminum Alloys by Adhesion Method Materials Transactions, Vol. 49, No. 5 (28) pp. 165 to 17 Special Issue on Platform Science and Technology for Advanced Magnesium Alloys, IV #28 The Japan Institute of Metals Influence of Coating on Magnesium

More information

MMFX 2 (ASTM A 1035, GRADE 100) STEEL REBAR CORROSION PERFORMANCE TESTING IN ACCORDANCE WITH AASHTO MP 18M/MP MMFX Technologies Corporation

MMFX 2 (ASTM A 1035, GRADE 100) STEEL REBAR CORROSION PERFORMANCE TESTING IN ACCORDANCE WITH AASHTO MP 18M/MP MMFX Technologies Corporation MMFX 2 (ASTM A 1035, GRADE 100) STEEL REBAR CORROSION PERFORMANCE TESTING IN ACCORDANCE WITH AASHTO MP 18M/MP 18-09 Prepared for: MMFX Technologies Corporation August 3, 2011 TCG # 11072 Report Prepared

More information

Initial Stage of Localized Corrosion on Zn - 5 mass% Al Alloy Coated Steels by Pulsed Photon Film Removal Technique

Initial Stage of Localized Corrosion on Zn - 5 mass% Al Alloy Coated Steels by Pulsed Photon Film Removal Technique Volume 6 Paper C093 Initial Stage of Localized Corrosion on Zn - 5 mass% Al Alloy Coated Steels by Pulsed Photon Film Removal Technique SAKAIRI Masatoshi a, ITABASHI Kazuma b and TAKAHASHI Hideaki a a

More information

Microstructural Evolution of Ti-Mo-Ni-C Powder by Mechanical Alloying

Microstructural Evolution of Ti-Mo-Ni-C Powder by Mechanical Alloying Materials Transactions, Vol. 50, No. 1 (2009) pp. 117 to 122 #2009 The Japan Institute of Metals Microstructural Evolution of -Mo-Ni-C Powder by Mechanical Alloying Hiroyuki Hosokawa, Kiyotaka Kato, Koji

More information

Localized Corrosion of a 7075 Aluminum Alloy Exposed to KCl

Localized Corrosion of a 7075 Aluminum Alloy Exposed to KCl Localized Corrosion of a 7075 Aluminum Alloy Exposed to KCl Christopher F. Mallinson Department of Mechanical Engineering Sciences The Surface Analysis Laboratory Monday, 20 April 2015 1 Outline Introduction

More information

Effects of Anodizing and Post Sealing on Corrosion Characteristics of Magnesium Alloys

Effects of Anodizing and Post Sealing on Corrosion Characteristics of Magnesium Alloys Effects of Anodizing and Post Sealing on Corrosion Characteristics of Magnesium Alloys Effects of Anodizing and Post Sealing on Corrosion Characteristics of Magnesium Alloys Supervisor: Professor Masazumi

More information

Electroless plating of Cu Ni P alloy on PET fabrics and effect of plating parameters on the properties of conductive fabrics

Electroless plating of Cu Ni P alloy on PET fabrics and effect of plating parameters on the properties of conductive fabrics Journal of Alloys and Compounds 455 (2008) 308 313 Electroless plating of Cu Ni P alloy on PET fabrics and effect of plating parameters on the properties of conductive fabrics Xueping Gan, Yating Wu, Lei

More information

LASER SURFACE MELTING OF 17-4 PH PRECIPITATION-HARDENABLE STAINLESS STEEL Paper 1203

LASER SURFACE MELTING OF 17-4 PH PRECIPITATION-HARDENABLE STAINLESS STEEL Paper 1203 LASER SURFACE MELTING OF 7- PH PRECIPITATION-HARDENABLE STAINLESS STEEL Paper 0 Zhichao Cheng, Chi Tat Kwok, Kin Ho Lo, Department of Electromechanical Engineering, University of Macau, Taipa, Macau Abstract

More information

Corrosion and Protection of Metal in the Seawater Desalination

Corrosion and Protection of Metal in the Seawater Desalination IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Corrosion and Protection of Metal in the Seawater Desalination To cite this article: Xiangyu Hou et al 018 IOP Conf. Ser.: Earth

More information

Threshold Chloride Concentration of Stainless Steels in Simulated Concrete Pore Solution

Threshold Chloride Concentration of Stainless Steels in Simulated Concrete Pore Solution 5th International Conference on Durability of Concrete Structures Jun 30 Jul 1, 2016 Shenzhen University, Shenzhen, Guangdong Province, P.R.China Threshold Chloride Concentration of Stainless Steels in

More information

Structural and Electrical Properties of Reaction Bonded Silicon Nitride Ceramics

Structural and Electrical Properties of Reaction Bonded Silicon Nitride Ceramics The Open Ceramic Science Journal, 2012, 2, 1-7 1 Open Access Structural and Electrical Properties of Reaction Bonded Silicon Nitride Ceramics Hosneara 1, Abul Hasnat *,2 and Abu Hasan Bhuyan 3 1 National

More information

Electrochemistry Written Response

Electrochemistry Written Response Electrochemistry Written Response January 1999 7. Balance the following redox reaction in acidic solution: RuO 4 + P Ru(OH) 2 2+ + H 3 PO 3 (acid) (3 marks) 8. A technician tests the concentration of methanol,

More information

EFFECTS OF HAMMER PEENING AND AGING TREATMENT ON MICROSTRUCTURE, MECHANICAL PROPERTIES AND CORROSION RESISTANCE OF OIL-GRADE ALLOY 718

EFFECTS OF HAMMER PEENING AND AGING TREATMENT ON MICROSTRUCTURE, MECHANICAL PROPERTIES AND CORROSION RESISTANCE OF OIL-GRADE ALLOY 718 EFFECTS OF HAMMER PEENING AND AGING TREATMENT ON MICROSTRUCTURE, MECHANICAL PROPERTIES AND CORROSION RESISTANCE OF OIL-GRADE ALLOY 718 Ting Chen 1, Hendrik John 2, Jing Xu 2, Jeffrey Hawk 3, Xingbo Liu

More information

Sensitization & Corrosion Behaviour of Austenitic Stainless Steel 304 & 316

Sensitization & Corrosion Behaviour of Austenitic Stainless Steel 304 & 316 Sensitization & Corrosion Behaviour of Austenitic Stainless Steel 304 & 316 Manish Kumar Verma Mechanical, Columbia Institute of Engineering & Technology, Raipur (India) ABSTRACT Austenitic Stainless steels

More information

Crystallographic Orientation Relationship between Discontinuous Precipitates and Matrix in Commercial AZ91 Mg Alloy

Crystallographic Orientation Relationship between Discontinuous Precipitates and Matrix in Commercial AZ91 Mg Alloy Materials Transactions, Vol. 52, No. 3 (2011) pp. 340 to 344 Special Issue on New Trends for Micro- and Nano Analyses by Transmission Electron Microscopy #2011 The Japan Institute of Metals Crystallographic

More information

The effect of electroplating of Cr and Sn on corrosion resistance of low carbon steel (CK15)

The effect of electroplating of Cr and Sn on corrosion resistance of low carbon steel (CK15) AMERICAN JOURNAL OF SCIENTIFIC AND INDUSTRIAL RESEARCH 2010, Science Huβ, http://www.scihub.org/ajsir ISSN: 2153-649X doi:10.5251/ajsir.2010.1.3.565.572 The effect of electroplating of Cr and Sn on corrosion

More information

HBLED packaging is becoming one of the new, high

HBLED packaging is becoming one of the new, high Ag plating in HBLED packaging improves reflectivity and lowers costs JONATHAN HARRIS, President, CMC Laboratories, Inc., Tempe, AZ Various types of Ag plating technology along with the advantages and limitations

More information

Influence of Shot Peening on the Fatigue Resistance of Sulfuric Anodized AA 7175-T74

Influence of Shot Peening on the Fatigue Resistance of Sulfuric Anodized AA 7175-T74 Influence of Shot Peening on the Fatigue Resistance of Sulfuric Anodized AA 7175-T74 H.J. C. Voorwald 1 a, T. A. Minto 1,b, M. Y. Pitanga 2,c, M. C. Fonseca 3,d 1 UNESP Department of Materials and Technology,

More information

Microstructure and Vacuum Leak Characteristics of SiC coating Layer by Three Different Deposition Methods

Microstructure and Vacuum Leak Characteristics of SiC coating Layer by Three Different Deposition Methods Microstructure and Vacuum Leak Characteristics of SiC coating Layer by Three Different Deposition Methods Y. Kim Professor, Department of Materials Science and Engineering, College of Engineering, Kyonggi

More information

Progress in Organic Coatings

Progress in Organic Coatings Progress in Organic Coatings 65 (2009) 229 236 Contents lists available at ScienceDirect Progress in Organic Coatings journal homepage: www.elsevier.com/locate/porgcoat Formation and characteristics of

More information

Effect of Chloride on Localized Corrosion Initiation of Carbon Steel in a CO 2 Aqueous Environment Xin Gao, Bruce Brown, Srdjan Nesic

Effect of Chloride on Localized Corrosion Initiation of Carbon Steel in a CO 2 Aqueous Environment Xin Gao, Bruce Brown, Srdjan Nesic Paper No. 3880 Effect of Chloride on Localized Corrosion Initiation of Carbon Steel in a CO 2 Aqueous Environment Xin Gao, Bruce Brown, Srdjan Nesic Institute for Corrosion and Multiphase Technology Ohio

More information

The Evaluation of Corrosion Behavior of AISI 347 Stainless Steel to ASTM A335 Low Alloy Steel Dissimilar Welds

The Evaluation of Corrosion Behavior of AISI 347 Stainless Steel to ASTM A335 Low Alloy Steel Dissimilar Welds , pp.14-18 The Evaluation of Corrosion Behavior of AISI 347 Stainless Steel to ASTM A335 Low Alloy Steel Dissimilar Welds I. Hajiannia 1, M.Shamanian 2* and M. Kasiri 3 1,3 Department of Materials Engineering,

More information

Cold Spray Coatings of Al Alloys for Corrosion Resistance

Cold Spray Coatings of Al Alloys for Corrosion Resistance 1 Cold Spray Coatings of Al Alloys for Corrosion Resistance Benjamin Hauch Benjamin Maier, DJ Devan, Kumar Sridharan*, Todd Allen University of Wisconsin - Madison *Contact: kumar@engr.wisc.edu 1 Presentation

More information

Arch. Metall. Mater. 62 (2017), 2B,

Arch. Metall. Mater. 62 (2017), 2B, Arch. Metall. Mater. 6 (7), B, 9- DOI:.55/amm-7- B.-H. KANG*, M.-H. PARK**, K.-A. LEE*** # EFFECT OF STRUT THICKNESS ON ROOM AND HIGH TEMPERATURE COMPRESSIVE PROPEIES OF BLOCK-TYPE Ni-Cr-Al POWDER POROUS

More information

Electronic supplementary information. Efficient energy storage capabilities promoted by hierarchically MnCo 2 O 4

Electronic supplementary information. Efficient energy storage capabilities promoted by hierarchically MnCo 2 O 4 Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 Electronic supplementary information Efficient energy storage capabilities promoted by hierarchically

More information

Optimization of Zinc Phosphating Process using Statistical Tool

Optimization of Zinc Phosphating Process using Statistical Tool Optimization of Zinc Phosphating Process using Statistical Tool E.Gurunathan 1*, A.Senthilkumar 2 1* Department of CAD/CAM Engineering, Sethu Institute of Technology, India 2 Department of Mechanical Engineering,

More information

ACCELERATED CORROSION TESTING OF GALVANIC COUPLES. James F. Dante, Josh Averett, Fritz Friedersdorf, and Christy Vestal

ACCELERATED CORROSION TESTING OF GALVANIC COUPLES. James F. Dante, Josh Averett, Fritz Friedersdorf, and Christy Vestal ACCELERATED CORROSION TESTING OF GALVANIC COUPLES James F. Dante, Josh Averett, Fritz Friedersdorf, and Christy Vestal Luna Innovations 706 Forest St. Suite A Charlottesville, VA 22903 dantej@lunainnovations.com

More information

NASF SURFACE TECHNOLOGY WHITE PAPERS 80 (7), 1-8 (April 2016) 10th Quarterly Report April - June 2015 AESF Research Project #R-117

NASF SURFACE TECHNOLOGY WHITE PAPERS 80 (7), 1-8 (April 2016) 10th Quarterly Report April - June 2015 AESF Research Project #R-117 10th Quarterly Report April - June 2015 AESF Research Project #R-117 Electrodeposition of Ni-Fe-Mo-W Alloys by Prof. E.J. Podlaha-Murphy, * and A. Kola Northeastern University Boston, Massachusetts, USA

More information

Characterization of Coatings on Grey Cast Iron Fabricated by Hot-dipping in Pure Al, AlSi11 and AlTi5 Alloys

Characterization of Coatings on Grey Cast Iron Fabricated by Hot-dipping in Pure Al, AlSi11 and AlTi5 Alloys A R C H I V E S o f F O U N D R Y E N G I N E E R I N G Published quarterly as the organ of the Foundry Commission of the Polish Academy of Sciences ISSN (1897-3310) Volume 14 Issue 1/2014 85 90 20/1 Characterization

More information

Structure of Electrodeposited Zn Mn Alloy Coatings

Structure of Electrodeposited Zn Mn Alloy Coatings , pp. 1024 1028 Structure of Electrodeposited Zn Mn Coatings Yasuo TSUCHIYA, Satoshi HASHIMOTO, Yoichi ISHIBASHI, Takayuki URAKAWA, 1) Masaru SAGIYAMA 2) and Yasuo FUKUDA 3) Kokan Keisoku K. K., Minamiwatarida,

More information

PARAMETER EFFECTS FOR THE GROWTH OF THIN POROUS ANODIC ALUMINUM OXIDES

PARAMETER EFFECTS FOR THE GROWTH OF THIN POROUS ANODIC ALUMINUM OXIDES 10.1149/1.2794473, The Electrochemical Society PARAMETER EFFECTS FOR THE GROWTH OF THIN POROUS ANODIC ALUMINUM OXIDES S. Yim a, C. Bonhôte b, J. Lille b, and T. Wu b a Dept. of Chem. and Mat. Engr., San

More information

High-Temperature-Resistant Interconnections Formed by Using Nickel Micro-plating and Ni Nano-particles for Power Devices

High-Temperature-Resistant Interconnections Formed by Using Nickel Micro-plating and Ni Nano-particles for Power Devices Kato et al.: High-Temperature-Resistant Interconnections (1/6) [Technical Paper] High-Temperature-Resistant Interconnections Formed by Using Nickel Micro-plating and Ni Nano-particles for Power Devices

More information

834 E. Jafari: J. Mater. Sci. Technol., 2010, 26(9),

834 E. Jafari: J. Mater. Sci. Technol., 2010, 26(9), J. Mater. Sci. Technol., 2010, 26(9), 833-838. Corrosion Behaviors of Two Types of Commercial Stainless Steel after Plastic Deformation Esmaeil Jafari Materials Science and Engineering Department, Islamic

More information

CHAPTER 7 STUDIES ON CORROSION RESISTANCE OF STAINLESS STEEL CLADDINGS

CHAPTER 7 STUDIES ON CORROSION RESISTANCE OF STAINLESS STEEL CLADDINGS 134 CHAPTER 7 STUDIES ON CORROSION RESISTANCE OF STAINLESS STEEL CLADDINGS 7.1 INTRODUCTION Corrosion is the destructive result of chemical or electrochemical reactions between a metal or metal alloy and

More information

EFFECT OF VOLUME FRACTION OF (Cr,Fe) 7 C 3 CARBIDES ON CORROSION RESISTANCE OF THE Fe-Cr-C HARDFACING ALLOYS AT

EFFECT OF VOLUME FRACTION OF (Cr,Fe) 7 C 3 CARBIDES ON CORROSION RESISTANCE OF THE Fe-Cr-C HARDFACING ALLOYS AT Association of Metallurgical Engineers of Serbia AMES Scientific paper UD: 621.791.5 EFFET OF VOLUME FRATION OF (r,fe) 7 3 ARBIDES ON ORROSION RESISTANE OF THE Fe-r- HARDFAING ALLOYS AT r = 6 Hamed Sabet

More information

Terephthalonitrile-derived nitrogen-rich networks for high

Terephthalonitrile-derived nitrogen-rich networks for high Electronic Supplementary Information Terephthalonitrile-derived nitrogen-rich networks for high performance supercapacitors Long Hao, a Bin Luo, a Xianglong Li, a Meihua Jin, a Yan Fang, a Zhihong Tang,

More information

XRD and TEM analysis of microstructure in the welding zone of 9Cr 1Mo V Nb heat-resisting steel

XRD and TEM analysis of microstructure in the welding zone of 9Cr 1Mo V Nb heat-resisting steel Bull. Mater. Sci., Vol. 25, No. 3, June 2002, pp. 213 217. Indian Academy of Sciences. XRD and TEM analysis of microstructure in the welding zone of 9Cr 1Mo V Nb heat-resisting steel LI YAJIANG*, WANG

More information

In-situ X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

In-situ X-ray Diffraction of Corrosion Products Formed on Iron Surfaces Materials Transactions, Vol. 46, No. 3 (2005) pp. 637 to 642 #2005 The Mining and Materials Processing Institute of Japan In-situ X-ray Diffraction of Corrosion Products Formed on Iron Surfaces Yohei Takahashi

More information

Effect of Heat Treatment on the Corrosion Behaviour of GTM- SU-718 Superalloy in NaCl, HCl and H 2 SO 4 environments

Effect of Heat Treatment on the Corrosion Behaviour of GTM- SU-718 Superalloy in NaCl, HCl and H 2 SO 4 environments International Journal of ChemTech Research CODEN (USA): IJCRGG, ISSN: 0974-4290, ISSN(Online):2455-9555 Vol.10 No.6, pp 617-621, 2017 Effect of Heat Treatment on the Behaviour of GTM- SU- Superalloy in

More information

Sn Cu Alloy Electrodeposition and Its Connecting Reliability for Automotive Connectors* 1

Sn Cu Alloy Electrodeposition and Its Connecting Reliability for Automotive Connectors* 1 Materials Transactions, Vol. 52, No. 6 (2) pp. 237 to 23 #2 The Japan Institute of Metals Sn Cu Alloy Electrodeposition and Its Connecting Reliability for Automotive Connectors* Hiroaki Nakano, Satoshi

More information

PHYSICAL PROPERTIES OF La 0.9 Sr 0.1 Cr 1-X Ni X O 3-δ (X = 0-0.6) SYNTHESIZED VIA CITRATE GEL COMBUSTION

PHYSICAL PROPERTIES OF La 0.9 Sr 0.1 Cr 1-X Ni X O 3-δ (X = 0-0.6) SYNTHESIZED VIA CITRATE GEL COMBUSTION PHYSICAL PROPERTIES OF La 0.9 Sr 0.1 Cr 1-X Ni X O 3-δ (X = 0-0.6) SYNTHESIZED VIA CITRATE GEL COMBUSTION Anuchit Ruangvittayanon * and Sutin Kuharuangrong Received: Sept 29, 2009; Revised: Nov 17, 2009;

More information

ELECTRIDEPOSITION AND WEAR BEHAVIOR OF NANO-STRUCTURED Cr-WC COMPOSITE COATINGS FROM A TRIVALENT CHROMIUM BATH

ELECTRIDEPOSITION AND WEAR BEHAVIOR OF NANO-STRUCTURED Cr-WC COMPOSITE COATINGS FROM A TRIVALENT CHROMIUM BATH 2nd International Conference on Ultrafine Grained & Nanostructured Materials (UFGNSM) International Journal of Modern Physics: Conference Series Vol. 5 (2012) 737 743 World Scientific Publishing Company

More information

DEVELOPMENT OF ENVIRONMENTALLY FRIENDLY FORMULATION FOR CORROSION RESISTANCE OF GALVANIZED STEEL SHEET

DEVELOPMENT OF ENVIRONMENTALLY FRIENDLY FORMULATION FOR CORROSION RESISTANCE OF GALVANIZED STEEL SHEET DEVELOPMENT OF ENVIRONMENTALLY FRIENDLY FORMULATION FOR CORROSION RESISTANCE OF GALVANIZED STEEL SHEET Ajala Praneedsuranon a*, Pranut Potiyaraj b,c a The Program of Petrochemistry and Polymer Science,

More information

CHAPTER-VII SUMMARY AND CONCLUSIONS

CHAPTER-VII SUMMARY AND CONCLUSIONS CHAPTER-VII SUMMARY AND CONCLUSIONS Chapter-VII Summary and Conclusions Sr. No. Title Page No. 7.1 Summary 167 7.2 Conclusions.. 171 CHAPTER SEVEN Summary and Conclusions 7.1: Summary The technologies

More information

Fatigue Strength of Ferritic Ductile Cast Iron Hardened by Super Rapid Induction Heating and Quenching

Fatigue Strength of Ferritic Ductile Cast Iron Hardened by Super Rapid Induction Heating and Quenching Materials Transactions, Vol. 45, No. 9 (4) pp. 293 to 2935 #4 The Japan Institute of Metals EXPRESS REGULAR ARTICLE Fatigue Strength of Ferritic Ductile Cast Iron Hardened by Super Rapid Induction Heating

More information

STRESS CORROSION CRACKING OF STAINLESS STEELS IN HIGH PRESSURE ALKALINE ELECTROLYSERS

STRESS CORROSION CRACKING OF STAINLESS STEELS IN HIGH PRESSURE ALKALINE ELECTROLYSERS STRESS CORROSION CRACKING OF STAINLESS STEELS IN HIGH PRESSURE ALKALINE ELECTROLYSERS Haraldsen, K. 1 and Leth-Olsen, H. 1 1 Corporate Research Centre, Norsk Hydro ASA, P.O.Box 2560, 3908 Porsgrunn, Norway

More information

P-6. Optimization of Citric Acid Passivation for Corrosion Resistance of Stainless Steel 440C. Chi Tat Kwok 1,2 and Wen He Ding 1.

P-6. Optimization of Citric Acid Passivation for Corrosion Resistance of Stainless Steel 440C. Chi Tat Kwok 1,2 and Wen He Ding 1. P-6 Optimization of Citric Acid Passivation for Corrosion Resistance of Stainless Steel 440C Chi Tat Kwok 1,2 and Wen He Ding 1 1 Department of Electrochemical Engineering, University of Macau 2 fstctk@umac.mo

More information

Preparation of Bi-Based Ternary Oxide Photoanodes, BiVO 4,

Preparation of Bi-Based Ternary Oxide Photoanodes, BiVO 4, Preparation of Bi-Based Ternary Oxide Photoanodes, BiVO 4, Bi 2 WO 6 and Bi 2 Mo 3 O 12, Using Dendritic Bi Metal Electrodes Donghyeon Kang, a, Yiseul Park, a, James C. Hill, b and Kyoung-Shin Choi a,*

More information

Improving Efficiency of Aluminium Sacrificial Anode Using Cold Work Process

Improving Efficiency of Aluminium Sacrificial Anode Using Cold Work Process IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Improving Efficiency of Aluminium Sacrificial Anode Using Cold Work Process To cite this article: Y. P. Asmara et al 2016 IOP

More information

Final Draft of the original manuscript:

Final Draft of the original manuscript: Final Draft of the original manuscript: Srinivasan, P.B., Blawert, C.; Dietzel, W.; Kainer, K.U.: Stress corrosion cracking behaviour of a surface-modified magnesium alloy In: Scripta Materialia (2008)

More information

Novel concept of rechargeable battery using iron oxide nanorods. anode and nickel hydroxide cathode in aqueous electrolyte

Novel concept of rechargeable battery using iron oxide nanorods. anode and nickel hydroxide cathode in aqueous electrolyte Supplementary Information for: Novel concept of rechargeable battery using iron oxide nanorods anode and nickel hydroxide cathode in aqueous electrolyte Zhaolin Liu *, Siok Wei Tay and Xu Li Institute

More information

Electro catalytic amorphous nickel alloy

Electro catalytic amorphous nickel alloy Indian Journal of Chemical Technology Vol. 14, March 2007, pp. 161-165 Electro catalytic amorphous nickel alloy V S Muralidharan Central Electrochemical Research Institute, Karaikudi 630 006, India Received

More information

Available online at ScienceDirect. Procedia Engineering 184 (2017 )

Available online at  ScienceDirect. Procedia Engineering 184 (2017 ) Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 184 (2017 ) 418 422 Advances in Material & Processing Technologies Conference Development of Al-Zn-Cu Alloy for Low Voltage

More information

Liquid Solubility of Manganese and Its Influence on Grain Size of Mg-Al Alloys* 1

Liquid Solubility of Manganese and Its Influence on Grain Size of Mg-Al Alloys* 1 Materials Transactions, Vol. 47, No. 8 (2006) pp. 1968 to 1974 #2006 The Japan Institute of Light Metals Liquid Solubility of Manganese and Its Influence on Grain Size of Mg-Al Alloys* 1 Yosuke Tamura,

More information

All-solid-state Li battery using a light-weight solid electrolyte

All-solid-state Li battery using a light-weight solid electrolyte All-solid-state Li battery using a light-weight solid electrolyte Hitoshi Takamura Department of Materials Science, Graduate School of Engineering, Tohoku University Europe-Japan Symposium, Electrical

More information

Surface Analysis of Electrochromic Switchable Mirror Glass Based on Magnesium-Nickel Thin Film in Accelerated Degradation Test

Surface Analysis of Electrochromic Switchable Mirror Glass Based on Magnesium-Nickel Thin Film in Accelerated Degradation Test Materials Transactions, Vol. 52, No. 3 (2011) pp. 464 to 468 #2011 The Japan Institute of Metals Surface Analysis of Electrochromic Switchable Mirror Glass Based on Magnesium-Nickel Thin Film in Accelerated

More information

HYBRID MANGANATE-BASED CONVERSION COATING ON ALUMINIUM ABSTRACT. Keywords: Aluminium, manganate/tannin/glycerol, adhesion, corrosion.

HYBRID MANGANATE-BASED CONVERSION COATING ON ALUMINIUM ABSTRACT. Keywords: Aluminium, manganate/tannin/glycerol, adhesion, corrosion. HYBRID MANGANATE-BASED CONVERSION COATING ON ALUMINIUM Makanjuola Oki Department of Mechanical Engineering Landmark University, Omu-Aran, Kwara State, NIGERIA ABSTRACT This investigation describes hybrid

More information

Potentiodynamic Studies of Aluminium 2024 Alloy in Different Concentration of Hydrochloric Acid Medium at Laboratory Temperature

Potentiodynamic Studies of Aluminium 2024 Alloy in Different Concentration of Hydrochloric Acid Medium at Laboratory Temperature Research Reviews: Journal of Material Science DOI: 10.4172/2321-6212.1000199 e-issn: 2321-6212 www.rroij.com Potentiodynamic Studies of Aluminium 2024 Alloy in Different Concentration of Hydrochloric Acid

More information

Passivity Definitions and Influencing Parameters

Passivity Definitions and Influencing Parameters Lecture 20 Passivity Definitions and Influencing Parameters Keywords: Definition of Passivity, Flade Potential, Anodic Polarization, Critical Anodic Current Density. In the Eh ph diagrams, resistance to

More information

Specimen Preparation Technique for a Microstructure Analysis Using the Focused Ion Beam Process

Specimen Preparation Technique for a Microstructure Analysis Using the Focused Ion Beam Process Specimen Preparation Technique for a Microstructure Analysis Using the Focused Ion Beam Process by Kozue Yabusaki * and Hirokazu Sasaki * In recent years the FIB technique has been widely used for specimen

More information

The Interaction between Hydrogen and Surface Stress in Stainless Steel

The Interaction between Hydrogen and Surface Stress in Stainless Steel The Interaction between Hydrogen and Surface Stress in Stainless Steel O. Takakuwa, Y. Mano, H. Soyama Abstract This paper reveals the interaction between hydrogen and surface stress in austenitic stainless

More information