Anodized aluminum surface stained Causes of Flooding

Resulting Anodized Aluminum surface flooding after staining were the following main reasons:

1 piece caustic pre-treatment is not thorough enough.

(2) low melt temperature dyeing.

3 staining solution surface oil.

4 film did not retire net rework.

5 oxide film is contaminated.

6 After oxidation washed thoroughly enough, not cleaned.

7 aluminum anodizing current density is too large.

8 anodizing solution temperature is too low, the current density is too small.

9 aluminum anodizing solution temperature.