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Tiếng ViệtLiquid Coating Pretreatment System
The pre-treatment stage of the painting line refers to the complete cleaning of the workpiece surface from contaminants such as oxidation, rust, oil, dust, and other impurities. This ensures that the powder coating or liquid coating can firmly adhere and bond with the metal surface, thereby enhancing the quality of the workpiece and extending its service life.
Production of the Pretreatment System in the Liquid Coating Line
Pretreatment involves either manual simple processes or automated pretreatment processes. The latter is further divided into automatic spraying and automatic immersion-spraying processes. Before powder coating, workpieces must undergo surface treatment to remove oil and rust. This stage utilizes a variety of chemical solutions, primarily including rust removers, degreasers, surface conditioners, and phosphating agents.
In the pretreatment stage or workshop of a coating line, it is crucial to establish necessary protocols for the procurement, transportation, storage, and use of strong acids and alkalis. Workers must be provided with essential protective gear, as well as safe and reliable containers, handling tools, and mixing equipment. Emergency response measures and rescue methods for potential accidents must also be developed. Furthermore, since the pretreatment stage generates a certain amount of waste gas, waste liquid, and other pollutants, environmental protection measures are essential. This includes installing exhaust systems, drainage systems, and waste treatment equipment.
The quality of pretreated workpieces can vary due to differences in pretreatment solutions and the specific liquid coating equipment processes. For well-treated workpieces, where surface oil and rust are thoroughly removed, phosphating or passivation treatment is generally applied in subsequent steps shortly after pretreatment to prevent rapid re-rusting. Prior to powder coating, phosphated workpieces should be dried to remove surface moisture. For small-batch or single-piece production, natural air-drying, sun-drying, or blow-drying are commonly used. For large-scale assembly line production, low-temperature baking using ovens or drying tunnels is typically employed.
ShengTai Painting Equipment specializes in providing advanced liquid coating equipment and comprehensive anti corrosion equipment solutions, ensuring efficient, safe, and environmentally compliant pretreatment processes for your coating line.
