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![Out From the Old to the New IS 8375 (1977): Method for checking continuity of anodized coatings [MTD 24: Corrosion Protection]!](/docs-images/80/80980631/images/1-3.jpg "न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge!")
1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS 8375 (1977): Method for checking continuity of anodized coatings [MTD 24: Corrosion Protection]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen
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5 Indian Standard METHOD FOR CHECKING CONTINUITY OF ANODIZED COATINGS IS : Metallic Finishes Sectional Committee, SMDC 23 Chairman DR S. KRISHNAMURTHY Representing Indian Telephone Industries Ltd, Bangalore Members SHR~ K. BALAKRISHANAN Central Electrochemical Research Institute ( CSIR ), Karaikudi SHRI S. R. NATARAJAN ( Alternate ) SHRI M. Y. BORKER SHRI P. K. SEN ( Alternate ) Ministry of Defence ( DGI ) SHRI M. S. CHAKRAVORTY Premier Metal Finishers (P) Ltd, Calcutta SHRI AHINDRA CHATTERJEE Canning Mitra Phoenix Ltd, Bombay SHRI S. V. KULKARNI ( Alternate ) SHRI D.X. CHATTERJEE Sen-Releigh Ltd, Asansol C H E M I s T & METALLURGIST, Ministry of Railways INTEGRAL C o A c H FACTORY, PERAMBUR CHEMIST & METALLURGIST II, RESEARCH, DESIGNS A N D STANDARDS ORGANIZATION, LUCKNOW ( Akrnate ) SHRI 0. P. CHHABRA Bharat Heavy Electricals Ltd, Ranipur SHRI R. M. SINGHAL ( Alternate ) SHRI KANTILAL T. DALAL Kohinoor Electra-Gilders, Bombay SHRI JAYENDRA K. DALAL ( Alternate ) SHRI P. K. DESHPANDE The Premier Automobiles Ltd, Bombay SHRI A. G. PRABHU ( Alternate ) SHRI C. P. DEY Hindustan Motors Ltd, Calcutta SHRI M. Z. KHAN Geep Flashlight Industries Ltd, Allahabad SHRI N. C. ROY ( Alternate I ) SHRI K. A. SIDDIQUI ( Alternate II ) SHRI U. G. K. MENON Ministry of Defence ( R & D ) SHRI G. R. K. MURTHY ( Alternate ) SHRI S. PANCHAPAKESAN T. I. Cycles of India, Madras SHRI R. VENKATARAMAN ( Alternate ) SHRI S. K. RAY National Metallurgical Laboratory ( CSIR ), Copyright 1977 INDIAN STANDARDS INSTITUTION ( Continued on page 2 ) This publication is protected under the Indian Copyright Act (XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.
6 IS : ( Continued from page 1 ) Members Representing SHRI R. SEN Hindustan Cables Ltd, R u p n a r a i n P u r ( Distt Burdwan ) SHRI KALYAN GHOSH ( Alternate ) SHRI R. A. SHAH Ronuk Industries Ltd, Bombay KUMARI MRIDULA A. SHAH ( Ahwzate ) SHRI SURRSH R. SHAH Grauer and Weil ( India ) Ltd, Bombay SHRI SUSHIL GO~NKA ( Alternate ) DR R. C. SHARMA Eveready Flashlight Company, Lucknow SHRI C. R. RAMA RAO, Director General, IS1 ( Ex-officio Member ) Director ( Strut & Met ) Secretary SHRI S. L. BALI Deputy Director ( Met ), ISI
7 Indian Standard METHOD FOR CHECKING CONTINUITY OF ANODIZED COATINGS IS : FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Institution on 25 February 1977, after the draft finalized by the Metallic Finishes Sectional Committee had been approved by the Structural and Metals Division Council. 0.2 Anodized coatings on aluminium and its alloys are increasingly being used in the industry. In order that the coating may be uniform throughout, it is necessary that the coating should be continuous. This standard provides rapid check to be made of the continuity of thin coatings of aluminium oxide on aluminium and its alloys. 1. SCOPE 1.1 This standard prescribes a copper sulphate test for checking continuity of thin anodic coating on aluminium and its alloys ( less than 5 micrometres thickness ). 2. PRINCIPLE 2.1 The check is carried out on portions of about 100 mm2 in area, chosen anywhere on the test piece except the points of feed-in of the current. If there are any points in the area where the metal is either bare or poorly coated, a chemical displacement of copper takes place on the aluminium accompanied by release of gas. The drop may be examined with the naked eye, immediately upon its application; the release of gas is almost instantaneous from points where the metal is bare. After the test, black points are noticed where the coating is not continuous. 3. REAGENT 3.1 Use a reagent of the following composition: a) Crystallized copper sulphate (CuSO,.SH,O) 20 g b) Concentrated hydrochloric acid (r.d. 1.16) 20 ml cl Distilled water 1000 ml 3
8 IS : PROCEDURE 4.1 Remove all grease from the test pieces, by vapour degreasing. Mark out an area -of about 100 mm2 on a horizontal part using a wax crayon. Alternatively, use a rapidly drying lacquer to delineate the test area, leaving the test area itself unlacquered. Cover the area thus defined with four drops of the reagent. cleave the solution in contact with the surface for 5 minutes. The room temperature should be 20&5 C. 5. EXPRESSION OF RESULTS 5.1 After 5 minutes of contact, rinse, examine the surface. Unless otherwise agreed, if the number of black spots do not exceed 5 per square centimetre, when examined by naked eye, the coating shall be considered as continuous.
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10 IS: Anodic coatings on aluminium ( first revision ) Recommendations for equipment for electroplating Glossary of terms relating to electroplating Sprayed aluminium and zinc coatings on iron and steel Method for evaluation of results of accelerated corrosion tests Hard anodic coatings on aluminium Recommended practice for metal spraying for protection of iron and steel Anodized aluminium for automobile use Method of testing corrosion resistance of electroplated and anodized aluminium coatings by acetic acid salt spray test Recommended practice for anodizing aluminium and its alloys Method of testing corrosion resistance of nickel-chromium plating by the corrodkote test
Disclosure to Promote the Right To Information
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Disclosure to Promote the Right To Information
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Disclosure to Promote the Right To Information
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Disclosure to Promote the Right To Information
इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information
Disclosure to Promote the Right To Information
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Disclosure to Promote the Right To Information
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ISO 2085 INTERNATIONAL STANDARD. Anodizing of aluminium and its alloys Check for continuity of thin anodic oxidation coatings Copper sulfate test
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