Real gold plating is a kind of material with real gold plating on the surface, and real gold plating is not easy to change color compared to imitation gold plating, so you need to be careful to identify real gold plating and imitation gold plating when buying, you can listen to the sound to identify or look at the mark directly, real gold jewelry will not change color after burning, but imitation gold will change color or lose luster after burning
The characteristics of gold plating
1, the appearance of a gold plating layer for gold *, with high chemical stability, only soluble in aqua regia and another super acid, insoluble in other acids gold atomic price for valence and trivalent, and valence of gold standard potential pAu + / Au for +1.68V, trivalent gold standard potential ° Au3 + / Au for +1.50V, on steel, copper, silver and its alloy substrate to enter, gold plating for cathodic plating, the plating The pores affect its protective performance.
2, gold plating layer ductility, easy polishing, and high-temperature resistance, there is a very good resistance to tarnishing properties, and the silver layer of gold plating can prevent silver tarnishing, in fact, gold alloy plating will show a variety of hues, so it is often used as decorative platings, such as plating jewelry, watch parts, artwork, etc.
3, gold plating contact resistance, electrical conductivity is very good, welding is also very cattle, corrosion resistance, and also has a certain wear resistance (refers to hard gold), so in precision instruments, printed circuit boards, integrated circuits, tube shells, electrical contacts, and other aspects have a wide range of applications.