1.Sand blasting: The main function is surface cleaning. Sand blasting before painting (painting or spraying) can increase the surface roughness and contribute to the improvement of adhesion, but the contribution is limited, it is not as good as before chemical coating.
2.Coloring: There are two main processes for coloring aluminum: one is aluminum oxidation coloring process, and the other is aluminum electrophoresis coloring process. Various colors are formed on the oxide film to meet certain use requirements, such as Optical instrument parts are often used in black, medals are on the golden yellow and so on.
3.Conductive oxidation (chromate conversion film): used for both protection and conduction.
4.Anodizing method: The anodizing method is a method of forming an oxide film on the surface of a workpiece or a product by using the electrolysis principle of direct current and alternating current and direct current to increase the corrosion resistance and make the appearance beautiful.
5.Electroplating treatment method: The electroplating treatment method uses the workpiece as a cathode, the material forming the plating layer as an anode, and both are placed in a bath having a plating solution, and then a direct current or an alternating current or a direct current is applied to form a material for plating. Ionization and running from the plating solution to the surface of the workpiece, firmly attached to the method of forming different thickness coatings.
