2 Spray method: Spray the chemical treatment solution on the surface of aluminum.
3 Coating method: Apply concentrated solution to the surface of aluminum.
The specific treatment method can be selected according to the production conditions and the purpose of the treatment, and generally the first or the second method is used more. Among them, the horizontal production line is mainly based on 1 method, and the vertical production line is mainly based on 2 methods.
The chemical conversion film of aluminum plate has a wide range of uses, and is mainly used for protecting aluminum plates and aluminum alloys from corrosion. The chemical conversion film of the aluminum plate can be used as a direct-use coating or as a bottom layer of an organic polymer coating, and has great industrial significance and has been widely used. The thickness of the chemical conversion film is much thinner than that of the anodized film, so its protection is also not protective against the anodized film, but the chemical conversion treatment is economical, convenient, fast, the production line structure is simple, and no power supply equipment is needed. Low-cost production of high-volume parts.