The automobile coating process can generally be divided into two parts: one is the surface treatment of the metal before coating, also called pre-treatment technology; the other is the construction process of the coating. Surface treatment mainly includes the removal of oil, dust, rust on the surface of the workpiece, and the removal of the old paint layer during repairing operations, so as to improve the surface condition of the workpiece. This includes machining and chemical treatments of the workpiece surface, such as phosphating, oxidizing and passivating, depending on the situation.
The anti-rust coating process of construction machinery can generally be divided into pre-coating surface treatment process and anti-rust primer coating process.