Various metals are deposited on aluminum alloys to obtain a decorative or engineering finish. The electroplates applied are usually chromium. Find the most up-to-date version of ASTM B at Engineering Buy ASTM B R GUIDE FOR PREPARATION OF ALUMINUM ALLOYS FOR ELECTROPLATING from SAI Global.
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Various metals are deposited on aluminum alloys to obtain a decorative or engineering finish.
The electroplates applied are usually chromium, nickel, copper, brass, silver, tin, lead, cadmium, zinc, gold, and combinations of these. Silver, tin, or gold is applied to electrical equipment to decrease contact resistance or to improve surface conductivity; brass, ast, nickel, or tin for assembly by soft soldering; chromium to reduce friction and obtain increased resistance to wear; zinc for threaded parts where organic lubricants are not permissible; tin or lead is frequently employed to reduce friction on bearing surfaces.
Nickel plus chromium or copper plus nickel plus chromium is used in decorative applications. Nickel plus brass plus lacquer or copper plus nickel plus brass plus lacquer is also used for decorative finishes, sometimes with the brass oxidized and relieved in various ways.
Electroless nickel may be applied as a barrier layer prior to other deposits, or for engineering purposes. The preparation of aluminum and aluminum alloy mandrels for electroforming is atsm in Practice. Corrosion performance is affected by many factors, however, including the procedure used to prepare the aluminum alloy for electroplating.
No other units of measurement are included in this standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
For specific precautionary statements see Section 7 and Appendix X1.
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ASTM B – 11() Standard Guide for Preparation of Aluminum Alloys for Electroplating
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