Anodic oxidation of aluminum plate sheet produces a hard protective layer on the surface of aluminum parts, which can be used to produce Kitchenware and other daily necessities. But the anodized effect of casting aluminum is not good, the surface is not Michael Wong, but also only black. Professional anodized aluminum sheet is a little better than it.
In the selection of professional anodized aluminium sheet technology (sulfuric acid oxidation, oxidation of oxalic acid and chromic acid oxidation) prior to aluminum or aluminum alloy material to understand, because the material quality, the ingredients contained different, will directly affect the quality of the anodic oxidation of aluminum products.
For example, such as aluminum surface air bubbles, scratches, peeling, rough defects, after anodic oxidation, all defects will still be revealed. And the alloy composition on the surface of anodized appearance, also have a direct impact. For example, the aluminum alloy sheets containing 1~2% manganese is oxidized to brownish blue. With the increase of manganese content in the aluminum alloy, the surface color changes from brown to dark brown. Aluminum Alloy silicon containing 0.6~1.5%, oxidized silicon containing 3~6% were grey, grey white. Zinc containing milky color, chromium yellow to gray uneven tone, nickel containing pale yellow. In general, only the aluminum containing magnesium and titanium content greater than 5% of gold, after oxidation can be colorless, transparent and bright, smooth appearance.