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Recommendations for the selection and use of pre-painted galvanized steel coils
The color-coated steel plate using pre-painted galvanized steel coil as the substrate, in addition to zinc protection, the organic coating on the zinc layer plays a role of covering and isolation, which can prevent the steel plate from rusting and has a longer service life than the galvanized steel plate. Introduction The service life of coated steel sheet is 50% longer than that of galvanized steel sheet. However, in different regions and different parts of use, the service life of color-coated boards with the same amount of galvanizing, the same coating, and the same coating thickness will be very different.
For example, in industrial areas or coastal areas, due to the action of sulfur dioxide gas or salt in the air, the corrosion rate is accelerated and the service life is affected.
In the rainy season, the pre-painted galvanized steel coil will be corroded quickly and its service life will be reduced if it is soaked by rainwater for a long time, or the parts where the temperature difference between day and night is too large and easy to condense. Buildings or workshops made of pre-painted galvanized steel coils have a long service life when they are often washed by rainwater, otherwise, they will be affected by the effects of sulfur dioxide gas, salt and dust. Therefore, in the design, the greater the inclination of the roof, the less likely it is to accumulate dust and other dirt, and the longer the service life;
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