What is the extrusion process of aluminum profiles?

1. Use chemical or physical methods to clean the surface of the profile, exposing the pure substrate, in order to obtain a complete and dense artificial oxide film. It is also possible to obtain a mirror or matte (matte) surface by mechanical means.

2. Anodic oxidation: the profile pretreated on the surface, under certain technological conditions, the surface of the substrate undergoes anodization, forming a dense, porous, strong adsorption Al2O3 film.

3. Pore sealing: The pores of the porous oxide film formed after anodizing are closed to enhance the anti-pollution, corrosion resistance and wear resistance of the oxide film. The oxide film is colorless and transparent. Taking advantage of the strong adsorption of the oxide film before sealing, some metal salts are adsorbed and deposited in the film pores, which can make the profile appearance appear many colors other than the original color (silver white), such as: black, bronze, Golden yellow and stainless steel etc.