There are several methods for surface treatment of industrial aluminum profiles, such as anodizing, powder coating, electrophoresis, etc. No matter which method is used, a protective film is formed on the surface of the aluminum profile. To judge whether the surface treatment of the industrial aluminum profile is up to standard, That is, it is judged whether the thickness of the oxide film is up to standard. The following small series will explain to you the thickness standard of oxide film obtained by each white surface treatment method.
One is anodizing.
The surface of the aluminum profile has a thick oxide film and is mainly divided into four grades according to the use requirements: AA10, AA15, AA20, and AA25, that is, the average thickness of the surface film thickness of the aluminum alloy profile is 10 μm, 15 μm, 20 μm, and 25 μm, respectively. 8 μm, 12 μm, 16 μm, 20 μm.
The second is powder coating.
The film thickness of the powder coating surface coating is generally not graded, and the average film thickness is usually not less than 40 μm and the partial thickness is not less than 35 μm.
The third is electrophoretic surface treatment.
Electrophoretic surface film thickness is generally divided into three grades: A, B, and S.
Class A: 12μm oxide film + 9μm electrophoresis film, the composite film thickness is not less than 21μm.
Grade B: 9μm oxide film + 7μm electrophoresis film, the composite film thickness is not less than 16μm.
S grade: 6μm oxide film + 15μm electrophoresis film, the composite film thickness is not less than 21μm.