ASTM B 920 - 01 (Reapproved 2006) Standard Practice for Porosity in Gold and Palladium Alloy Coatings on Metal Substrates by Vapors of Sodium Hypochlorite Solution

American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2006. Published December 2006. Originally approved in 2001. Last previous edition approved in 2001 as B 920 - 01. 4 p. This test practice covers equipment and methods for revealing the porosity of gold and palladium coatings, particularly electrodeposits and clad metals used on electrical contacts.
This test practice is suitable for coatings containing gold or 75 % by mass of palladium on substrates of copper, nickel, and their alloys, which are commonly used in electrical
contacts.