Coat too Thin / Impossible to increase the thickness
Suggested action
- Increase voltage, fluidization and powder feed.
- Check resistance between different objects on conveyer. The ideal film reading is 0 ohm.
- Check earth connection from conveyer and outward.
- Check spray equipment fuses, voltage, electrodes in gun mouth and all electrical connections to high tension cable.
- Check powder by using another powder spray gun.
Poor Flow / Orange Peel Effect
Suggested action
- Adjust spray gun equipment parameters for uniform powder output and recommended film thickness.
- Use fastest possible heat up rate in oven.
- Check optimum distance between object and gun mouth.
Different Powder Outputs from Guns
Suggested action
- Different hose lengths between powder feeds and guns
- Air pressure too low
- Electric fault or partial blocking of injector hose or gun
Improper Curing
Suggested action
- If problems arise due to over or under-curing from oven
- Check that all thermostats are working properly
- Check air circulation
- Check metal temperature using temperature recorder.
No Powder From Guns
Suggested action
- Check all fuses
- Check compressed air & fluidisation pressure
- Blow through pneumatic system with air gun
Particles / Dirt in Powder Coat Film
Suggested action
- Check that product is completely clean before coating
- Prevent dust from entering spray booth
- Sieve powder and examine if there's contamination or residue in sieve
Full Depth Craters
Suggested action
- This indicates contamination of object prior to coating
- Check whether water-based paint has been used nearby
- Check whether silicon is present in any materials or lubricants. This often happens during welding jobs
