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

is crucial to ensure that the workpiece surface achieves the best coating effect. The following are the maThe pre-treatment process of the electrostatic powder coating production line in steps of the pre-treatment process:

Step 1 Wash
Purpose: To remove oil, dirt, rust and other impurities from the surface of the workpiece.
Methods: Chemical cleaning agent, ultrasonic cleaning or high pressure water gun can be used for cleaning.
Step 2 Skim
Purpose: To further remove grease and dirt from the surface to ensure the adhesion of the paint.
Method: Using strong alkaline or acid cleaning agent, degreasing was carried out by soaking or spraying.
3. Pickling
Objective: To remove the oxide layer and rust on the metal surface, increase the surface roughness, and improve the adhesion of the coating.
Method: Use an acidic solution (such as sulfuric acid or hydrochloric acid) for pickling.
Step 4 Wash
Objective: To thoroughly remove chemical residues used during cleaning and degreasing.
Method: Rinse the workpiece with clean water to ensure that no chemicals remain on the surface.
5. Surface treatment
Objective: To provide ideal surface conditions for subsequent powder spraying.
Methods: Phosphating, passivation or sandblasting can be used to increase surface adhesion and corrosion resistance.
Step 6: Dry
Objective: To ensure that there is no moisture on the surface of the workpiece, so as not to affect the adhesion effect of the powder coating.
Methods: The workpiece was thoroughly dried by hot air drying or natural drying.
Sum up
The pre-treatment process is an indispensable part of the electrostatic powder coating production line, which directly affects the quality and durability of the coating. Through the above steps, it is possible to ensure that the workpiece surface is clean, rough and suitable for the subsequent powder spraying process.