Hard anodizing is a special surface treatment process, mainly used in aluminum and aluminum alloy materials. It is designed to form a hard, wear-resistant, corrosion-resistant and good insulating and heat-resistant oxide film on the surface of the material by means of electrolytic oxidation. This process is suitable for aluminum and aluminum alloy parts that require high wear resistance, heat resistance and good insulation properties, such as the inner walls of various cylinders, pistons, steam plugs, cylinders, bearings, aircraft cargo hold floors, roller bars and guides, hydraulic equipment, steam impels, levelers, gears and cushion parts.

Electroplating is a process in which a thin layer of other metals or alloys is plated on certain metal surfaces using the principle of electrolysis. The principle is that the gold-plated workpiece is used as the cathode, the electroplated metal is used as the anode (sometimes the metal that is insoluble in the electroplating solution is used as the anode), and the electroplating liquid is the electroplated metal compound and conductive salts, additives, etc. When the poles are connected to the power supply (direct current), the metal ions in the plating solution move to the cathode, where the electrons are obtained, which are reduced and deposited on the cathode surface to become the coating.

Now many industries of precision parts will use CNC machining production, but after CNC machining is completed, many products surface is still relatively rough, this time you need to carry out secondary surface finishing treatment.