The aluminum plate of the anode is oxidized, and a thin layer of aluminum oxide is formed on the surface with a thickness of 5 to 20 microns, and the hard anodized film can reach 60 to 200 microns. The anodized aluminum plate improves its hardness and wear resistance, up to 250-500 kg/mm2, has very good heat resistance, the hard anodized film has a melting point of up to 2320K, excellent insulation, and breakdown resistance The voltage is as high as 2000V, which enhances the anti-corrosion performance. It will not corrode for thousands of hours in ω=0.03NaCl salt spray.

There are a lot of micropores in the thin oxide film layer, which can adsorb various lubricants, suitable for the manufacture of engine cylinders or other wear-resistant parts; the film micropores have strong adsorption capacity and can be colored into various beautiful and bright colors. Non-ferrous metals or their alloys (such as aluminum, magnesium and their alloys, etc.) can be anodized.

Anodized aluminum sheets are widely used in mechanical parts, aircraft auto parts, precision instruments and radio equipment, architectural decoration, machine casings, lamps and lighting, consumer electronics, handicrafts, household appliances, interior decoration, signs, furniture, automotive decoration and other industries.