Dongguan QiMao Electronics Co., Ltd.

The appearance of the gold-plated layer is golden yellow and has high chemical stability. It is only soluble in aqua regia and other super acids, and insoluble in other acids. The atomic valences of gold are one and three. The standard potential φ°Au+/Au of monovalent gold is +1.68V, and the standard potential φ°Au3+/Au of trivalent gold is +1.50V. For steel, copper, silver and its alloy substrates, the gold coating is a cathodic coating, and the porosity of the coating affects its protective performance.

The gold-plated layer has good ductility, easy polishing, high temperature resistance and good discoloration resistance. Gold plating on the silver layer can prevent the discoloration of silver; gold alloy plating can present a variety of hues, so it is often used as a decorative plating, such as plated jewelry, watch parts, works of art, etc.

Gold plating has low contact resistance, good electrical conductivity, easy welding, strong corrosion resistance, and certain wear resistance (referring to hard gold). Electrical contacts and other aspects have a wide range of applications.