Gold plating is a process in which we deposit a very thin layer of gold on the surface of another metal predominantly by chemical or electro-chemical plating. Gold is generally one of the protective metals of choice due to its higher standard electrode potential compared to other metals like palladium, silver, copper, tin, nickel etc. This makes it the most noble metal for plating with the highest corrosion resistance. Moreover, they are inert and quite resistant to oxidation. Due to its scarcity and higher cost, gold is often sparingly applied. They can be plated directly on a base metal or gold can be applied over an undercoating such as nickel to improve adhesion of the gold itself.