1.What is the scratch resistance of color coated coils?
Different types of color-coated coils have different scratch resistance. For example, fluorocarbon color-coated sheets, which are processed with high-end technology, have excellent surface hardness and wear resistance and are relatively less prone to scratches. Some special color-coated coils, such as anti-scratch color-coated aluminum sheets, are cured with a granular anti-scratch coating process, and are more than five times stronger than ordinary color-coated aluminum sheets, and can resist scratches from sharp objects. In addition, color-coated coils with thicker coatings and higher hardness usually have better scratch resistance.
2.What are the methods for repairing scratches?
Physical method: For deeper wounds, mechanical equipment grinding, metal wire drawing and other physical methods can be used for repair. These methods can make the scratches less obvious by grinding the surface, but may have a certain impact on the glossiness of the plate surface.
Chemical method: Generally, chemicals are used for polishing. By slightly corroding the surface of the color-coated coil, the raised part where the scratches are located is removed, so that the surface is restored to a smooth surface. Mild scratches can be completely removed, and the surface of the material is bright and beautiful after chemical polishing. In practical applications, physical methods and chemical methods are usually used in combination to achieve better repair effects.
3.How does the self-healing function of special coatings perform?
Some color-coated coils use zinc-aluminum-magnesium coatings, which have a certain self-healing effect. The magnesium dissolved from the coating can form a fine and dense magnesium-containing oxide film on the cut section, covering the exposed steel base at the scratched or cut parts, thereby improving its scratch and corrosion resistance and repairing the impact of scratches on the performance of the plate to a certain extent.
4.What are the repair effects and precautions?
Minor scratches can be restored to a relatively good state through appropriate repair methods, which basically does not affect its use and appearance. However, for deeper and more serious scratches, it is difficult to completely restore to the original state. In addition, it is necessary to pay attention to the operating specifications during the repair process to avoid causing new damage to the color-coated coil. For example, when repainting, it is necessary to first use alcohol to remove dirt, paraffin and other filth on the repaired area, and ensure that the paint is fully dried and solidified after repainting.
5.Which is better, scratch resistance or corrosion resistance of color coated coil?
The two cannot be directly compared: scratch resistance depends on the hardness of the coating, while corrosion resistance is related to the substrate and the density of the coating. The applicable scenarios are different and need to be selected according to needs.