The process of cleaning the surface of the object to be coated before painting, removing various oils (such as lubricants, degreasers, greases, sweat stains, etc.) and dust, to ensure the surface is clean, is an indispensable step in the pre-coating treatment process. Whether to perform chemical treatment (also known as conversion film treatment) or mechanical processing treatment (such as shot blasting) on the clean surface, and which to choose, depends on the base material and surface condition of the object to be coated. Zhengzhou Tianzhu Spray Painting Equipment Company's pre-coating equipment process for the spraying production line is detailed as follows:

Selecting the appropriate pretreatment process for your product can significantly enhance the properties of the coating, maximizing its effectiveness. If only degreasing is performed before coating, general processing rules can be considered. If a conversion film is present, it can further improve the coating's properties, extend its lifespan, and achieve a multiplier effect. Acid pickling and linitization result in a "dull surface" on the base material, providing the coating with excellent adhesion, further enhancing its bond strength, and fully realizing the actual coating properties. The presence of the linitized film is crucial as it can prevent undercoat corrosion, ensuring that after coating damage, it is less prone to large-scale corrosion, and even rust or cracking. This is due to the uniform surface layer of the linitate treatment, which can suppress the occurrence of some galvanic cells.

Dust is the enemy of quality in the painting production line, easily causing particle defects in the coating. To improve particle defects, the frequency of the spray booth's filter cleaning has been increased from every two weeks to once a week. If the filter core was previously cleaned with solvent Q, it can be soaked in the solvent to dissolve the condensate that has attached to the filter core, and then use solvent Q again.

The pre-treatment process for the coating production line has been covered for now; feel free to refer to it.