Introduce the anti-corrosion performance of Color corrugated roof steel sheet

Introduce the anti-corrosion performance of Color corrugated roof steel sheet

After a period of time, due to various environmental factors, the coating performance and service life of the Color corrugated roof steel sheet will be reduced, requiring recoating. The basic requirement for recoating is good durability with good adhesion to the original coating. According to the usage, it can be divided into three categories. According to the environmental usage, the first category, in the natural environment, has certain anti-corrosion requirements for Color corrugated roof steel sheet. For example: the construction site is under construction, using color-coated insulation panels; category 2, used in natural environments, has a certain degree of corrosion resistance and appearance. For example: outdoor buildings, in some harsh environments, need some anti-corrosion.To get more news about anti corrosion roofing sheet, you can visit nanomet-sales official website.

The adhesion of different prepainted steel sheets determines the color coating system. There are many hydroxyl groups and amino groups on the surface of the polyurethane coating. The architectural color coatings are mostly semi-gloss coatings. The coating contains a large amount of fillers or light powder. The coating surface under the microscope has a certain roughness.

According to the theory of surface wetting, the surface tension of the modified coating must be lower than the surface tension of the coating, so that the coating can be wetted; the coating must contain hydrogen bonding polar groups; the coating should contain a strong solvent to extend the coating to increase the coating at the same time, the cross-linked coating can use low relative molecular weight resin or reduce the coating viscosity, so that the coating has low volatility and low coating viscosity.