ASTM B 735 - 06 Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor

American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2006. Published December 2006. Originally approved in 1984. Last previous edition approved in 2005 as B 735 – 05. 4 p. This test method covers equipment and procedures for using nitric acid vapor for determining porosity in gold coatings, greater than 0.6 μm (25 μin.) in thickness, particularly electrodeposits and clad metals used on electrical contacts.