How To Solve The Problem Of Yellowing Of Industrial Aluminum Profiles?

Many aluminum profile manufacturers attach great importance to the yellowing of industrial aluminum profiles. Next, we will analyze the yellowing of industrial profiles.

Poor oxidation conduction of industrial aluminum profiles may cause yellowing. If there is poor contact between the aluminum profile and the conductive rod, the resistance increases and the time for the oxide film to form is shortened. If the oxide film forms too quickly, the oxide film may be powdered, so the oxide film will become turbid and the surface of the industrial profile will turn yellow. If the next process is continued, the yellowing of the industrial aluminum surface will be more obvious. If the industrial profile is not cleaned before electrophoresis, the surface will turn yellow. As we all know, if the aluminum is not cleaned before electrophoresis, it will turn yellow. The main reason for this phenomenon is that the acid radicals in the pores of the oxide film react with the electrophoretic paint, causing the electrophoretic paint film to turn yellow.

The oxidation tank liquid is contaminated by nitric acid, causing the industrial profile to turn yellow. The addition of nitric acid plays a role in removing ash, but after washing, nitric acid is likely to be brought into the oxidation tank, which has a certain impact on oxidation, and it is more serious.

The surface of industrial profiles will turn yellow. We need to add neutralizers and adjust the pH value to change the yellowing phenomenon.