Color steel coils will gradually age under wind and sun, and at the same time will shorten their service life. Let's go...
Color steel coils will gradually age under wind and sun, and at the same time will shorten their service life. Let's go with the editor to see how color steel coils should prevent aging.
The first prerequisite for color steel coils to produce aging or photochemical reactions is that the surface components of color steel coils can digest and absorb radiation; secondly, when the radiation energy absorbed by molecular structure digestion exceeds the bond energy of molecular structure, the coating of color steel coils can be dissolved. Because the shorter the wavelength of the light source, the higher the kinetic energy it contains.
According to this basic theory, the embrittlement of color steel coils in atmospheric pollution is that the molecular structure of the coating absorbs the kinetic energy of the ultraviolet band in natural light that is higher than the bond energy of the molecular structure, causing the molecular structure of the coating to dissolve. With the aging of the polyurethane coating, the base material itself is gradually lost, and the surface of the coating gradually becomes matte and loses its gloss. This kind of lack of the base material finally leaves a relatively stable color paste object, which is left on the surface of the polyurethane coating in an unbonded powder form. This whole process is called delamination.
In general, there are big differences in anti-aging properties of polyester color steel coils with different coatings. The anti-aging performance of thin-coated color steel coils is weak, and the anti-aging properties of all normal thin and thick coatings are relatively good.