Powder coating is to use powder spraying equipment (electrostatic spraying machine) to spray powder coating on the surface of the workpiece. Under the action of static electricity, the powder will be evenly adsorbed on the surface of the workpiece to form a powder coating; the powder coating is baked at high temperature. Bake leveling and curing, and become the final coating with different effects (different types of powder coatings); the spraying effect of powder spraying is better than that of spray painting in terms of mechanical strength, adhesion, corrosion resistance, aging resistance, etc., and the cost is also higher. Under spray paint with the same effect.