The production of architectural aluminum profiles
includes three processes: casting, extrusion and oxidation. All three of these processes are very important, and I'm going to talk to you about the very important one -- oxidation. With the increasing awareness of oxidation, people are paying more attention to oxidation. Surface oxidation treatment is very necessary, and its effect is very obvious.
So why oxidation?
Extruded architectural aluminum profiles, whose surface corrosion resistance is not strong, must be treated by anodic oxidation surface to increase the corrosion resistance, wear resistance and appearance of aluminum.
The main oxidation process is:
1. Surface pretreatment: chemical or physical methods are used to clean the surface of architectural aluminum profiles to expose a pure matrix, so as to facilitate the complete and dense artificial oxide film. Mirror or matte (matte) surfaces can also be obtained mechanically.
2. Anodizing: After surface pretreatment of profiles, under certain technological conditions, anodizing occurs on the surface of the substrate to generate a dense, porous and strong adsorption AL203 film.
3. Hole sealing: the pores of the porous oxide film generated after anodic oxidation are closed, so that the oxidation film is anti-pollution, anti-corrosion and anti-wear properties are enhanced. The oxide film is colorless and transparent, using the strong adsorption property of the oxide film before the sealing hole, the adsorption and deposition of some metal salt in the film hole, can make the architectural aluminum profiles appearance of many colors outside the natural color (silver white), such as: black, bronze, gold and stainless steel color.