Good Procedures & Practices for Producing Trouble Free Coatings:
- Maintain a clean & dust free atmosphere and work area. Ensure that the gun and booth are clean before commencing work.
- Inspect work area and eliminate possibilities of accumulated dirt on roofing structures and other equipment from blowing of falling on the work piece.
- Do not mix powders from two different suppliers/manufacturers.
- Careful attention should be given to having clean, dry, oil free compressed air supply, at the recommended pressure.
- Periodically drain off water from the compressor tank and flush the airline dry.
- Clean sieved reclaimed powder should be mixed in small proportionate quantities, as the work progresses, and not allowed to accumulate and collect dirt and moisture.
- Always stores powder in a closed sealed container and in a cool and dry place. The powder should not be left in the equipment for long periods when not being used
- Good earthing of job and equipment is essential.
- Check that the pretreatment chemicals are in good condition and of the correct strength. Remove the sludge accumulate at the bottom of the tanks.
- Give due attention to surface pretreatment of workpiece. Ensure that the job is duly cleaned of surface contaminants, blow holes and cavities are filled and finished, degreased, de-rusted, passivated, phosphate/chromate and duly passivated and dried. In the case of castings, greater care is required to clean the blow holes/porous surface. After pretreatment ensure that dirt and dust does not settle on the job, and it is coated and cured at the earliest.
- Metallic powders should be used with the charging voltage set to minimum. Recycled/recovered powder should be used with caution and care.