Powder coating is the application of a dry paint in the form of a powder onto a surface using the principle of electrostatic charging. Powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. After the application process the paint is cured under heat to allow it to flow and form a “skin”.
Before applying the finish, the chosen part must either chemically or mechanically cleaned, removing dirt, oils, old, finishes, and oxidation. Poor surface preparation results in powder coating problems, which is because of impurities and poor adhesion between the powder and the metal base.