How to Prevent Color Steel Coil from Aging
2022-10-25
The color steel coil will be aged if it is used for too long or not used for a long time, and will be exposed to sunlight during long-term project construction or storage. Long term direct exposure to light will lead to aging, which is difficult to prevent, but people can usually prevent premature decline in the rate of aging. What should people do?
The primary premise of color steel coil aging or photochemical reaction is that the surface layer of color steel coil can digest and absorb radiation; Secondly, when the molecular structure absorbs more radiation energy than the bond energy of the molecular structure, the color steel coil coating will dissolve. Because the smaller the wavelength of the light source, the higher the kinetic energy it contains.
According to this basic theory, the embrittlement of color steel coil caused by air pollution is that the molecular structure of the coating absorbs and absorbs the kinetic energy of ultraviolet light band in natural light higher than the molecular structure bond energy, The molecular structure of the coating is dissolved. With the aging of polyurethane coating, the substrate itself is gradually missing, and the coating surface gradually becomes unsmooth and lusterless. This type of substrate loss leaves a relatively smooth paste that remains on the surface of the polyurethane coating as an unbonded powder. This process is called layering.
Generally speaking, the anti-aging properties of thin and thick polyester steel coils are very different. The anti-aging ability of thin coated color steel coil is weak, while the anti-aging characteristics of all ordinary thin and thick coatings are relatively good.
But people can usually prevent premature decline in the rate of aging. What should people do?
The primary premise of color steel coil aging or photochemical reaction is that the surface layer of color steel coil can digest and absorb radiation; Secondly, when the molecular structure absorbs more radiation energy than the bond energy of the molecular structure, the color steel coil coating will dissolve. Because the smaller the wavelength of the light source, the higher the kinetic energy it contains.
According to this basic theory, the embrittlement of color steel coil caused by air pollution is that the molecular structure of the coating absorbs and absorbs the kinetic energy of ultraviolet light band in natural light higher than the molecular structure bond energy, The molecular structure of the coating is dissolved. With the aging of polyurethane coating, the substrate itself is gradually missing, and the coating surface gradually becomes unsmooth and lusterless. This type of substrate loss leaves a relatively smooth paste that remains on the surface of the polyurethane coating as an unbonded powder. This process is called layering.
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