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why powder coating Poor adhesion

why powder coating Poor adhesion
Update Time:2014-09-30
why poor adhesion of powder coating and how to solve ?
1) dirty or poor substrate pre-treatment :Check the pre-treatment equipment and pre-treatment solution

2) not fully cured coating :Enhance the cure temperature or cure time

3 )thick coating: Reduce static voltage or shorten the time to reduce spray coating thickness

4 )substrate thickness or type of change :Associated with suppliers