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How to oxidize aluminum material

In practical technology, anodizing for aluminum alloys is quite common, which can be applied in daily life. It is considered that the characteristics of this technology make the surface of aluminum pieces produce a hard protective layer, and it can be used to produce Kitchenware and other daily necessities. But the anodized effect of the cast aluminum is not good, the surface is not Michael Wong, but it can only be black. Aluminum alloy profiles are a little better. Over the past ten years, the technology of aluminum oxidation and coloring has been developing rapidly. Many factories have adopted new technology, and have accumulated rich experience in actual production. There are many methods for the anodizing of aluminum and its alloys, which are already mature and developing, and the suitable process can be selected according to the actual production needs. Before selecting the oxidation process, we should know something about the aluminum or aluminum alloy material, because the quality and the content of the material will directly affect the quality of the anodized aluminum products. On this point, Mr. Hong and Comrade Fan Ji have a special discussion (see the second phase P.27 of electroplating and finishing in 1982). For example, aluminum surface such as air bubbles, scratches, peeling, rough defects, after anodic oxidation, all defects will still be revealed. The composition of the alloy also has a direct effect on the surface appearance of the anodic oxidation. For example, the aluminum alloy containing 1 to 2% Mn is brown after oxidation. With the increase of manganese content in the aluminum material, the surface color after oxidation is transformed from brown to dark brown. The aluminum alloy containing 0.6 ~ 1.5% silicon is gray after oxidation and white gray when the silicon is 3 ~ 6%. The zinc content is opacification, and the chromic is golden to gray inhomogeneous hue, and the nickel is pale yellow. In general, only magnesium and titanium containing more than 5% of the titanium containing gold can be oxidized and transparent and bright and smooth after oxidation. After the selection of aluminum and aluminum alloy materials, it is natural to take into consideration the selection of the appropriate anodizing process.

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