The plating process uses the principle of electrolysis to coat a layer of metal on a conductor. Electroplating refers to a surface processing method that uses the base metal to be plated as a cathode in a salt solution containing pre-plated metal to deposit the cations of the pre-plated metal in the plating solution on the surface of the base metal through electrolysis to form a plating layer.
The coating performance is different from the base metal and has new characteristics. According to the function of the coating, it is divided into protective coating, decorative coating and other functional coatings.
During electroplating, the plated metal or other insoluble materials are used as the anode, the workpiece to be plated is used as the cathode, and the cations of the plated metal are reduced to form a coating on the surface of the workpiece to be plated. It can enhance the corrosion resistance of metals (corrosion-resistant metals are mostly used for coating metals), increase hardness, prevent abrasion, improve conductivity, smoothness, heat resistance and surface aesthetics.