Nowadays, various auto parts die-casting or products are more and more used in daily life, such as auto parts, aluminum alloy doors and windows, etc. The wide range of applications is enough to prove its performance. Today I will tell you its excellent anti-corrosion performance. The higher the purity of the aluminum alloy, the better its corrosion resistance, mainly because pure aluminum has a certain effect on air and oxygen, forming a thin and dense natural oxide film on the surface of the aluminum. It is faster and thicker than other metal oxide films. Although it can prevent further corrosion of harmful gases and moisture in the air, it can also play a protective role. Aluminum alloy profiles have high mechanical strength, but low corrosion resistance. However, pure aluminum has good corrosion resistance but poor mechanical strength. This limits the application of aluminum to a certain extent. Therefore, people add appropriate amounts of magnesium, copper and zinc to aluminum. There are many kinds of metal materials, the mechanical strength of aluminum is greatly improved, and the scope of application is greatly expanded, but its corrosion resistance is not as good as pure aluminum.