company news about The pre-treatment of the electrostatic powder coating line

The pre-treatment of the electrostatic powder coating line is a crucial step to ensure the quality and adhesion of the coating. 

Cleaning:

1. • Use chemical cleaners to remove oil, dust, and other contaminants from the surface of the workpiece.
   • This can be done through methods such as spraying, soaking, or ultrasonic cleaning.

2. Rust Removal:

   • For metal workpieces, it is necessary to remove oxides and rust, typically using acid cleaning or sandblasting.
   • Sandblasting can effectively remove surface irregularities and oxide layers, providing a good adhesion base.

3. Phosphating or Passivation:

   • Form a protective film through phosphating or passivation treatment to enhance the adhesion and corrosion resistance of the coating.
   • Phosphating treatment can also improve the wear resistance of the coating.

4. Drying:

   • After cleaning and treatment, the workpieces must be thoroughly dried to avoid moisture affecting the adhesion and curing of the coating.

5. Surface Treatment:

   • Depending on the requirements, perform surface roughening to increase the mechanical adhesion of the coating.

6. Preparation for Electrostatic Spraying:

   • Before spraying, ensure that the surface of the workpiece is clean to avoid any contaminants affecting the spraying effect.

By following these steps, the quality and durability of electrostatic powder coating can be effectively improved.