For the anodic oxidation of aluminum alloy, more, can be applied in daily life, thought the characteristics of this process, so that the surface of aluminum parts to produce a hard protective layer, can be used for the production of kitchenware and other daily necessities. But casting aluminum anodic oxidation effect is not good, the surface is not good, but also can only be black. Aluminum alloy profile is going to be a little better, the following is a brief introduction to the method of aluminum oxidation treatment.

In the past decade, China's aluminum oxidation coloring process technology development is faster, many factories have adopted the new process technology, and in the actual production has accumulated a wealth of experience. There are many mature and developing anodic oxidation process methods for aluminum and its alloys, from which suitable processes can be selected according to actual production needs.

Before selecting the oxidation process, the material of aluminum or aluminum alloy should be understood. Because, the quality of the material, the quality of the material, the composition of the different, will directly affect the quality of aluminum products after anodic oxidation. On this point, Hong Jiude, Fan Ji comrades have been specifically discussed (see "Electroplating and Finishing" 1982, No. 2 P.27).

For example, aluminum surface such as bubbles, scratches, skinning, roughness and other defects, after anodic oxidation, all defects will still be revealed. The alloy composition also has a direct effect on the surface appearance after anodizing.

For example, aluminum alloy containing 1~2% manganese is brownish blue after oxidation, and with the increase of manganese content in aluminum, the surface color after oxidation transforms from brownish blue to dark brown.

Aluminum alloy containing 0.6 to 1.5% silicon is gray after oxidation, and when it contains 3 to 6% silicon, it is white-gray.

Zinc-containing is milky color, chromium-containing is golden to gray uneven tone, nickel-containing is light yellow.

Generally speaking, only the aluminum containing magnesium and titanium containing more than 5% of gold, after oxidation can get colorless transparent and bright, shiny appearance.