How Powder Coating Works
Preparation: Before applying the powder coating, the metal surface must be thoroughly cleaned and pretreated to ensure proper adhesion. This may include processes like sandblasting, chemical cleaning, or phosphating.
Application: The dry powder (usually made of a mixture of resins, pigments, and other chemicals) is applied using an electrostatic spray gun. The gun charges the powder particles, which are attracted to the grounded metal surface. The powder forms a thin layer of coating over the surface.
Curing: After application, the coated item is placed in an oven and heated to a specific temperature (typically between 160°C and 200°C or 320°F to 400°F). This process melts the powder and bonds it to the surface, forming a smooth and durable finish.
Cooling: The coated object is allowed to cool down, solidifying the coating into a strong, tough, and resistant finish.
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