Views: 7 Author: Site Editor Publish Time: 2021-04-18 Origin: Site
The surface treatment before industrial aluminum paint is small, and the aluminum surface is relatively smooth. If there is no surface treatment, the coating material is low, and the corrosion resistance is relatively low, sometimes in the paint film Corrosion.
Therefore, the aluminum surface needs appropriate surface treatment before painting. The treatment method mainly has three forms, including electrochemical anodization, chemical solution oxidation, phosphating primers. The surface of the anode oxidation or chemical solution should be applied as soon as possible, and it is not more than 24 hours. If it is more than 24 hours, the adhesion will drop. At this time, the primer can be subjected to a phosphating primer or then a solution treatment is carried out. The reason is that the new anodized film surface is porous, and there is a good adhesion to the organic coating. If the shelving time is longer, the oxide film is aging to reduce the adhesion.
