Due to the poor adhesion of the coating film on the surface of the object to be coated or the primer layer, scraping the coating film with a fingernail or metal will cause the phenomenon of the coating film to fall off, which is called peeling.
The Reason Why Car Paint Is Easy To Peel Off
- The surface pretreatment before painting is not clean, and there are contaminants such as oil and water on the surface, which makes the coating lose its firm adhesion to the surface of the material.
- The drying temperature is too high and the drying time is too long, which makes the base coat over-dried.
- The surface of the coated object is too smooth.
- The paint matching is not appropriate, and the adhesion between paints is poor.
- Apply the surface layer when the base coat is not dry to form a dry bottom layer.
Prevention Method Of Easy Peeling Off Of Paint On Automobile Sheet Metal Parts
- The pretreatment method before coating should be appropriate, so that the surface of the coated object is completely free of oil and water.
- Drying is carried out in strict accordance with the drying conditions specified by the process to prevent over-drying.
- Use sandpaper to polish the surface of the coating that is too smooth to improve the adhesion of the coating film.
- Choose the paint variety and process with good matching.
- After the base coat is dried, the top coat is applied.
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