Because the criteria for measuring the use limit are not uniform, the concept of service life of color coated sheets can not be uniform. The service life of color coated panels usually includes two aspects, one is the weatherability of coatings, the other
is the overall anticorrosion performance of color coated panels.
The service life of color coated panels is generally evaluated by long-term exposure test of outdoor hanging panels under various typical atmospheric and corrosive conditions, and combined with the results of accelerated climate resistance test of simulated environment in laboratory.
Of course, this is only to speculate the probabilistic life under the given working conditions, and there is still a certain gap between the actual life of color coated panels in construction.
PVDF is a kind of polyvinylidene fluoride. The largest electronegative property of fluorine atom forms a very stable fluorocarbon bond. With the unique symmetry of its molecule, PVDF has super stability, unique ultraviolet photolysis resistance, excellent insulation and mechanical properties.
PVDF fluorocarbon coating plate is made of American PPG fluorocarbon coating containing Kynar 500 PVDF resin. Kynar 500 fluorocarbon resin content is more than 70%, and inorganic ceramic pigments with stable antioxidant performance are used. Its neutral salt spray resistance test is more than 960 hours, and ultraviolet aging test is more than 1800 hours. It has excellent toughness, chemical resistance, acid rain resistance and ultraviolet erosion resistance. At the same time, because of the excellent self-cleaning function of the fluorocarbon coating, the maintenance cost is very low in the later use process.
Based on the above data, it is estimated that under normal operating conditions, the corrosion resistance and fading resistance of Amina fluorocarbon color plate can reach 20-25 years, and the integrity of paint film can reach more than 40 years. It is very suitable for public buildings such as airports, high-speed railway stations, gymnasiums, etc. with high anti-fading performance, and for steel plants and electric power plants with high requirements for corrosion resistance. Factory, chemical industry, coastal and other fields.