Lack of Charging and Insufficient Film Buildup
Problem:Struggling with inadequate film coverage due to poor charging? There are several reasons this could be happening. We’ve formed a simple list for you to figure out the true cause and solution of your charging and coverage problem.
The powder delivery rate is too high, resulting in inadequately charged powder.
Reduce the powder delivery rate until the powder is appropriately charged. Also, make sure the spray gun is positioned correctly.
Voltage to the charging electrode is too low.
Assess the electrical continuity throughout the electrostatic system. Clean or repair the voltage-limiting components.
The part is not grounded enough for the film to build.
Check any contact areas to ensure that there is no buildup of cured powder coating, grease, or any other insulating material that could impede the ground.
During application, the powder coating is passing the part.
To stop this from happening, adjust and optimize the spray gun positioning and air flow rates effectively powder coat the part.
Stay tuned for our next post to find out more in our problem-solution series on issues with charging and film buildup.