The main reasons for the surface blooming of aluminum profiles after anodizing and dyeing are as follows:
1. Alkaline washing before the workpiece is not thorough enough.
2. The temperature of the dyeing melt is too low.
3. There is oil stain on the surface of the dyeing solution.
4. Reworked products with unreturned film.
5. The oxide film is contaminated.
6. After oxidation, the water washing is not thorough enough and not cleaned.
7. The current density is too large during anodization.
8. The temperature of the anodizing solution is too low and the current density is too small.
9. The temperature of the anodizing solution is too high.