For surface-pretreated profiles, under certain process conditions, the surface of the substrate is anodized, forming a dense, porous, strong adsorption AL203 film layer.
Sealing: Seal the pores of the porous oxide film generated after anodization to enhance the anti-pollution, corrosion resistance and wear resistance of the oxide film.
The oxide film is colorless and transparent. By utilizing the strong adsorption of the oxide film before sealing, some metal salts are adsorbed and deposited in the film pores, which can make the surface of the profile show many colors other than the original color (silver white), such as: black, bronze, Golden yellow and stainless steel color, etc.
