Aluminum alloy is a common metal material, with light weight, high strength, corrosion resistance and other advantages, so it is widely used in aviation, automotive, construction and other fields. However, the surface of aluminum alloy is susceptible to oxidation, resulting in a decline in surface quality and affecting service life. In order to solve this problem, several different oxidation methods have been invented: hard anodizing and ordinary anodizing, and micro-arc anodizing.

Ordinary oxidation is a simple oxidation method that can form an oxide layer with a thickness of 5-20 microns on the surface of an aluminum alloy. This oxide layer has certain corrosion resistance and decorative, which can make the aluminum alloy surface show different colors and luster. The process of ordinary oxidation is to soak aluminum alloy products in the electrolyte containing sulfuric acid and oxidizing agent, and form an oxide layer on the surface of aluminum alloy through electrolytic reaction. The advantages of ordinary oxidation are low cost, simple process and good decorative effect.