How to deal with the aluminum perforated sheet turning black

The black of aluminum perforated sheet depends on the physical properties of the aluminum plate. The old oxide film formed by the reaction of the aluminum plate with oxygen is dark black, and the oxide film has no effect the quality of the product.

How to deal with the aluminum perforated sheet turning black?The old oxide film is black. To remove it, immerse it in a strong alkali solution for 30 minutes to remove the black oxide film, and then clean the aluminum sheet. The aluminum sheet was connected to the cathode with 20% dilute sulfuric acid, and electrolysis was carried out under 12v-15v direct current for 12 hours. Wash after finishing.

It can also directly cover the oxide film and electrostatic spray the surface of the aluminum plate punching sheet, and the color can be selected arbitrarily.To know more info of perforated Metal sheet,please contact QUNKUN METAL for further communication.