The difference between low temperature aluminum hard anodizing and normal temperature anodizing

【China Aluminum Industry Network】 Normal aluminum hard anodized is also called ordinary oxide film thickness is generally 5-15 microns, hardness 200-400HV.

Low-temperature oxidation is generally used for hard oxidation, the characteristics of hard oxidation

1: The color film layer is gray, brown, dark green to black, and related to the material composition and process, and the lower the temperature, the thicker and darker the film layer.

2: hardness hardness of the oxide film is extremely high, in pure aluminum HV = 1200-1500, the hardness of aluminum alloy on the significantly reduced. HV=400-800. Since the micro-hole can absorb lubricant, it can greatly improve the wear resistance.

3: The thick film layer can reach 250 microns, so it is also called thick film oxidation.

4: Corrosion has extremely high corrosion resistance, especially in industrial atmospheric and marine climates.

5: Insulation and Insulation Hard film resistance is large. The film is 100μm thick. It can withstand 2000V or more, the melting point is 2050°C, and the thermal conductivity is as low as 67KW/(MK). It is an excellent heat-resistant material.

6: The binding force is very strong with the body.

Due to the characteristics of hard anodized aluminum, it is widely used. Mainly used for heat-resistant, wear-resistant, highly insulating aluminum parts, such as pistons, cylinders, bearings, hydroelectric equipment impellers.

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