Why aluminum profiles should be powder coated

Why should aluminum profiles be powder coated?

Aluminum profiles have been widely used in building doors, windows, curtain walls and other products for many years because of their small specific gravity, easy processing, and high mechanical strength. Aluminum is a relatively light metal with silvery white luster, and its corrosion resistance has the following two characteristics:

The higher the purity, the better the corrosion resistance, mainly because pure aluminum reacts with oxygen in the air, producing a thin and dense natural oxide film on the aluminum surface, which is much faster and thicker than other metal oxide films. , And thus prevent the further corrosion of harmful gases and moisture in the air, and play a protective role.

Aluminum profiles have high mechanical strength, but low corrosion resistance. Although pure aluminum has good corrosion resistance, it has poor mechanical strength, which restricts the application of aluminum to a certain extent. For this reason, people add appropriate amounts of magnesium, copper, zinc and other metals to aluminum to make various types of , So that the mechanical strength of aluminum is greatly improved, and the scope of application is greatly expanded, but the corrosion resistance is worse than pure aluminum, so it is likely to be corroded due to oxidation. This requires powder coating to protect the aluminum alloy profiles.

In addition to high corrosion resistance, the powder-coated aluminum profile also has many advantages such as diversified colors and good surface texture. It echoes with various colors of architectural exterior paint to adapt to different building styles.