The meaning of plating one metal on the surface of another metal is a long-established technology to improve surface hardness. strength to withstand thermal degradation and abrasion and include corrosion protection, anodizing and tin plated  This is to bring the material to be coated with the surface of the workpiece as well. Thermal spraying, electroplating, physical and chemical vapor coating, painting, magnetic coating on the disc. Almost all industries are treated with plating, including the aerospace industry. automotive industry Chemical and Petroleum Industry as well as medical parts. plating hardened steel This is to increase the hardness of the steel by heating it to cause the steel to change its crystal structure. then cool down by cooling rate must be fast enough for the steel to change its crystal structure to martensite, which has high hardness Therefore, in the plating industry Metals are classified in the metal finishing industry. which is the supporting industry of many other major industries such as automotive, electronics, construction equipment, jewelry heavy equipment home appliances, telecommunications, etc. Surface Plating, Samut Prakan , lentus