Specifies requirements for nickel or nickel plus chromium coatings on iron, steel, zinc alloy, copper or other alloy, and aluminium or aluminium alloy. It also provides for coatings incorporating a copper undercoat, and for use of gold, copper, brass or other metals plated over nickel. Microporous chromium coatings are also included. It does not apply to coatings on screw threads. For nickel plus chromium, four service condition numbers according to severity are provided and the coating classification, including thickness, is given for each number and each basis metal; for nickel alone or with topcoats other than chromium, three application grades according to severity are provided. Tests are cross-referenced to AS 2331.