Electroplating is the process that a thin layer of certain metals or alloys are plated on the surface of other metals in the electrolysis principle, which uses the electrolysis to make metal or other materials attached with a layer of the metal film, so as to prevent the metal from oxidizing (rusting for example), to improve the wear resistance, electrical conductivity, reflectivity, anti-corrosion (copper sulfate, etc.), and to increase the aesthetics.