Powder
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Advice & Guidance
- 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.
- 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 hose lengths between powder feeds and guns
- Air pressure too low
- Electric fault or partial blocking of injector hose or gun
- 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.
- Check all fuses
- Check compressed air & fluidisation pressure
- Blow through pneumatic system with air gun
- 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
- 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
- This usually indicates contamination of the powder, though they may also indicate contamination of the object
- Check that compressed air is free of water and oil
- Check that powder is free of craters when using another spray gun or by melting powder on a plate
- Test the powder coat on other objects
- Ensure that the cleaning / pre-treatment is proper
- Check if under-curing is taking place
- Check if substrate thickness or type has changed
- Ensure powder film thickness is proper