Anodized aluminum sheet is oxidized and a thin layer of alumina is formed on the surface, with a thickness of 5 ~ 20 μ m. The hard anodic oxide film is 60 ~ 200 μ m。 Anodized aluminum plate improves the hardness and wear resistance, up to 250-500 kg / mm2, good heat resistance, hard anodized film hardness up to 2320k, good insulation, breakdown voltage up to 2000V, and enhanced corrosion resistance ω= No corrosion for thousands of hours in salt spray of 0.03 NaCl. The oxide film has a large number of micropores in the thin layer, which can adsorb various lubricants. It is suitable for manufacturing engine cylinders or other wear-resistant parts; The microporous adsorption capacity of the membrane can be colored into various beautiful colors. Non ferrous metals or their alloys (such as aluminum, magnesium and their alloys) can be anodized.

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