What role does Polyester Film Sand Paper play in metal anti-rust treatment?

With its sharp wear-resistant sand grains and excellent flexibility, Polyester Film Sand Paper has become a core tool for metal surface pretreatment. During grinding, polishing or rust removal, Polyester Film Sand Paper can effectively remove stubborn impurities such as oil, rust, and scale on the metal surface. Through physical friction, it not only significantly improves the cleanliness of the metal surface, but also forms a uniform rough texture through micro-cutting. This increase in roughness is crucial because it provides a larger contact area and mechanical bite points for the subsequent anti-rust coating, thereby greatly enhancing the adhesion of the coating to the metal substrate.

The pretreatment effect of Polyester Film Sand Paper directly determines the quality of the coating. Metal surfaces that have not been fully treated may have hidden contaminants or smooth areas, causing the coating to fall off or blister. After systematic grinding with Polyester Film Sand Paper, the metal surface reaches an ideal "anchoring" state, laying a reliable foundation for anti-rust coating.

The metal surface treated with Polyester Film Sand Paper has a unique micro-roughness feature, and this structure is crucial to the performance improvement of anti-rust coatings. First, the rough surface allows the coating to spread and penetrate more evenly, filling tiny pits and reducing coating defects. Second, the texture formed by Polyester Film Sand Paper can reduce the water permeability and air permeability of the coating, blocking the penetration path of moisture and oxygen to the metal substrate, thereby significantly improving the corrosion resistance of the coating.

The metal parts pretreated with Polyester Film Sand Paper can increase the coating bonding strength by more than 30%, and the salt spray resistance test time is extended by 50%. Polyester Film Sand Paper is not only a surface treatment tool, but also a key factor in extending the service life of metal products.

The flexibility and deformability of Polyester Film Sand Paper make it outstanding in the treatment of complex-shaped metal parts. Whether it is a curved surface, an edge or a special-shaped structure, Polyester Film Sand Paper can fit the surface tightly to achieve all-round uniform grinding. In areas that are difficult to handle with traditional rigid sandpaper, Polyester Film Sand Paper can also complete fine processing through local pressure adjustment to avoid rust-proof weak points caused by omissions.