Pre Coating Treatment Equipment

Qingguo Intelligent is pre coating treatment equipment manufacturer and supplier in China who can wholesale pre coating treatment equipment. Pretreatment refers to a series of operations that must be carried out before coating materials, including surface cleaning, degreasing, rust removal, sandblasting, etc. These steps can effectively improve coating adhesion, corrosion resistance, and other properties, thereby making the coating effect more outstanding.

Steps for pre-treatment before painting

1. Surface cleaning: Before painting, it is necessary to ensure that the surface of the workpiece is clean and dust-free. If there is grease, dust and other dirt on the surface, it will affect the adhesion of the coating and even cause the coating to peel off. Surface cleaning methods include water washing, chemical cleaning, etc.

2. Oil removal: Before painting, it is necessary to ensure that the material surface is free of oil stains, as coatings often cannot adhere to oil stains. Usually, solvent cleaning, alkali cleaning, electrolytic cleaning and other methods are used.

3. Rust removal: Steel and other metals will produce rust and other oxide layers when stored for a long time or exposed to external environments. These oxide layers not only affect the aesthetics, but also the quality of the coating. There are three methods for rust removal: mechanical rust removal, chemical rust removal, and electrolytic rust removal.

4. Sandblasting: Sandblasting refers to the use of high-pressure gas to spray materials such as casting sand or steel balls that have passed through a nozzle onto the surface of the material being processed, in order to remove dirt and debris, and thus keep the material surface in a dust-free state. Before painting, a coating primer treatment is carried out, followed by coating decoration.

Example: Pre treatment process for automotive painting

The importance of Pretreatment before painting

Although the Pretreatment steps before painting are time-consuming and laborious, they have a significant impact on the painting effect. Firstly, it can effectively improve the adhesion and corrosion resistance of the coating, thereby ensuring the stability of the coating quality. Secondly, pre-treatment before coating can enhance the hydrophilicity and adsorption capacity of the material surface, resulting in a more outstanding coating effect. In addition, pre-treatment before painting can also reduce the probability of defects such as spots and fish eyes appearing after painting.

Pre coating treatment is very important, only after sufficient processing steps can the quality and stability of the coating effect be guaranteed. In practical operation, appropriate treatment methods and process flows should be selected based on different material types, process requirements, and the required coating degree and glossiness of the desired effect.