Anodizing equipment:

The metal or alloy article as an anode , electrolysis method so that surface oxidized material film. Metal oxide film changes the surface state and performance, such as surface coloring, improve corrosion resistance, enhance wear resistance and hardness, protect the metal surface.
For example, aluminum anodized , aluminum and its alloys in the appropriate electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as an anode, under certain conditions and the role of the applied current, electrolysis. The aluminum of the anode or its alloy is oxidized to form a thin layer of alumina with a thickness of 5 to 20 m and a hard anodic oxide film of 60 to 200 m on the surface. Anodized aluminum or its alloy, to improve its hardness and wear resistance, up to 250 to 500 kg / mm2, good heat resistance, hard anodic oxide film melting point of up to 2320K, excellent insulation, resistance to attack Wear voltage up to 2000V, enhanced corrosion resistance, in the ω = 0.03NaCl salt spray by thousands of hours without corrosion. Thin film oxide layer has a large number of pores, can absorb all kinds of lubricants, suitable for the manufacture of engine cylinder or other wear parts; membrane adsorption capacity can be colored into a variety of beautiful beautiful bright colors. Non-ferrous metals or their alloys (such as aluminum, magnesium and its alloys, etc.) can be anodized, this method is widely used in mechanical parts, aircraft parts, precision instruments and radio equipment, daily necessities and building decoration and so on. [2] Generally speaking, the anode is aluminum or aluminum alloy as the anode, the cathode is the selection of lead plate, the aluminum and lead plate together in the aqueous solution, there are sulfuric acid, oxalic acid, chromic acid, electrolysis, aluminum And the surface of the lead plate to form an oxide film. Among these acids, the anodic oxidation with sulfuric acid is the most widely used.