BS 7371-4:1994 : Coatings on metal fasteners — Part 4: Specification for electroplated nickel, nickel/chromium and copper/nickel/chromium coatings
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This Part of BS 7371 specifies requirements for coating applied by electrolysis solutions of copper; nickel or chromium. The coatings consist principally of copper, nickel or chromium and are not usually lubricated.