MIL-G-45204:  MIL-G-45204 is a gold plating specification for the electrodeposition of gold and the properties of the deposit. These specifications are typically used within the  aerospace, automotive, home electronics, oil & gas, as well as the pharmaceutical industry. Common applications that use this type of specification are barrels, connector pins, electrical switch contacts, and other high-tech electronic components. 

ASTM B488: The ASTM B488 gold plating standard applies to engineering applications. Gold coatings that comply with this spec typically are used to increase the substrate’s resistance to corrosion and to prevent tarnishing.