Apparatus and process for forming a powder coating
Powder coatings are solid compositions which are usually applied by an electrostatic
application process in which the powder coating particles are electrostatically charged and caused to adhere to a substrate which is usually metallic andelectrically earthed. The charging of the powder coating particles is usually achieved by interaction of the particles with ionised air (corona charging) or by friction (triboelectric, tribostatic or "tribo" charging) employing a spray gun. The chargedparticles are transported in air towards the substrate and their final deposition is influenced, inter alia, by the electric field lines that are generated between the spray gun and the substrate.
Apparatus and process for forming a powder coating