Standard Guide for Preparation of Aluminum Alloys for Electroplating

Importancia y uso:

3.1 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, copper, 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.

3.1.1 Electroless nickel may be applied as a barrier layer prior to other deposits, or for engineering purposes.

3.2 The preparation of aluminum and aluminum alloy mandrels for electroforming is described in Practice B432.

Subcomité:

B08.02

Referida por:

B0904-00R21, B0700-20, B0488-18, B0766-23, B0905-00R21, B0456-17R22, B0177_B0177M-11R21, B0689-97R23, B0999-15R22, B0832-93R23, B0317_B0317M-23

Volúmen:

02.05

Número ICS:

25.220.10 (Surface preparation)