By electrolytic plating process is the principle on some metal surfaces coated with a thin layer of another metal or alloy of the process is the use of electrolysis of metal or other material attached to the surface parts of the process of a metal film which serve to prevent corrosion, improve the wear resistance, electrical conductivity, reflectivity and enhance aesthetic effect.

Plating, coating of metal or other non-soluble material as the anode, the cathode workpiece to be coated, the coating of metal cations to be plated are reduced to form the surface coating. To exclude the interference of other cations, and the coating uniform, solid, required coating metal cation-containing solution as the plating solution in order to maintain constant concentration of the coating metal cation. The purpose of plating is plated metal coating on a substrate, the substrate surface to change the nature or size. Electroplating can enhance the corrosion resistance of the metal (metal coating of corrosion resistant metal and more), increase the hardness, to prevent wear, improved electrical conductivity, lubricity, heat resistance and surface appearance.