Process

  • Determine the type of material you are going to powdercoat and then select a suitable powder for the finish. Powdercoating is done with thermoplastic or thermoset polymer powder, and these materials are formulated for bonding with different base metals to give the best results.
  • Disassemble all threaded or lubricated interfaces before you begin, including anything you don’t want to be coated.
  • Clean the base metal thoroughly. Using bead or abrasive blasting on hard metal, such as cast iron or steel, will remove mill and rust scale, dirt and foreign materials. Chemical solvent cleaning will remove any grease, oil, or paint, and light sanding can be done to finish preparing the surface. Aluminum, magnesium, and other soft alloy metals can be solvent cleaned and wire brushed, or sanded if needed. The next step is to strip the metal of any remaining grime or gunk.
  • Apply the powder to the object to be powder coated. This is done using a “gun” or compressed air sprayer which electrostatically charges the powder material so that it sticks to the grounded base metal object receiving the coating. Make sure you have your electrostatic charge hooked up to whatever part you are coating. The powder you use won’t properly adhere unless it’s given a charge to hold onto.After applying the coat but before curing, be careful not to brush or blow on the powder coat, as this will cause some of the powder to fall off, leaving you with a less precise coat.
  • Cure the metal at a temperature appropriate for the powder material you use. A conventional oven is suitable for this purpose if the metal is small enough to fit, otherwise, an infrared heat lamp or other flame less heat source needs to be used. Normally, the object is heated to 350° to 375° F (175° to 190° C) for about 10 to 15 minutes, and allowed to cool.