Aluminum is treated mechanically and chemically to form a protective layer on the surface of the product to protect the body. It can reach a stable state in nature, increase the corrosion resistance of the body and increase the beauty of the product, thereby enhancing the value of the product. The choice of surface treatment type must first be based on the use environment, service life, and human appreciation. Of course, economic value is also the core consideration.
The surface treatment process includes pre-treatment, film formation, and post-film treatment. Packaging and storage. Shipping and other processes, in which pre-treatment includes mechanical treatment and chemical treatment.
Mechanical treatment includes blasting, shot blasting, grinding, polishing, waxing and other processes. The purpose of mechanical treatment is to eliminate unevenness on the surface of the product and remedy other poor appearance phenomena on the surface. Chemical treatment removes oil and rust from the surface of the product, and forms a layer that can better combine the film-forming substances or form an active metal body, ensuring a stable state of the coating and increasing the binding force of the protective layer, thereby protecting the body. effect.
Aluminum surface treatment
Common chemical treatments for aluminum include chromation, spray painting, electroplating, anodizing, electrophoresis and other processes. Among them, mechanical processing includes drawing, polishing, spraying, grinding and other processes.
Chromization will form a chemical conversion film on the surface of the product. The thickness of the film is 0.5-4um. This conversion film has good adsorption and is mainly used as the base layer of the coating. The appearance includes golden yellow, aluminum color, green, etc. This kind of conversion film has good conductivity and is the best choice for electronic products, such as conductive strips in mobile phone batteries, magnetoelectric equipment, etc. This coating is suitable for all aluminum and aluminum alloy products. However, the conversion film is soft and not wear-resistant, so it is not suitable for use as external parts of products.
Chromation process:
Degreasing -> Aluminum acid removal -> Chromation -> Packaging -> Warehousing
Chromization is suitable for aluminum and aluminum alloys, magnesium and magnesium alloy products.
