a method of applying paint coatings using the energy of properly treated compressed air and creating an appropriate electrostatic field enabling proper adhesion of the coating to the covered surface.
Water-based paints require clean, oil-free, dry air in order to achieve the best paint results without potential fish-eyes or other imperfections. These can lead to a lot of additional re-work or a complete re-paint. Oil-free compressed air is recommended for water-based paint applications because it eliminates the risk of oil-vapor in the compressed air, and oil coming into contact with the paint. If you do not have an oil-free compressor, be sure to use proper activated carbon filtration in your system, either directly after your air compressor or at the point of use.
Solvent-based paints require clean dry air as well, but oil-free air is not a requirement. In either case, you should use a coalescing filter (for liquids) and a particulate filter to remove impurities from your compressed air, as these contaminants will damage paint surfaces.
Powder-based electrostatic painting uses mixture of powder and compressed air ejected from the lance and the air around the electrode are ionized (negatively charged). The workpiece passes through the conveyor through the conveyor link (grounding pole), so that an electric field is formed between the spray gun and the workpiece, and the powder reaches the surface of the workpiece under the double push of the electric field force and the compressed air pressure and forms a layer on the surface of the workpiece by electrostatic attraction creating uniform coating.