The cause of pinholes in the powder coating of aluminum profile

The reason for the occurrence

1. Powder coating is contaminated, recycled powder is not confirmed

2. Compressed air contains oil or water when spraying

3. Powder coating moisture content is too large, moisture-affected lumps

4. When replacing the powder, the production equipment is not cleaned thoroughly, and the recovery powder is not sampled to confirm

Countermeasures.

1. Improve the original formula of the powder, when replacing the powder to clean thoroughly, to prevent cross-contamination, recycling powder to sample confirmation

2. Powder storage environment room temperature to keep dry, the unused powder to tie the plastic pocket to prevent moisture

3. It is required to check the compressed air dewatering and de-oiling equipment devices frequently, and to discharge the residual water and oil from the compressed air tank

4. Increase training and pay attention to 6S.