SHANDONG JULONG PREPAINTED STEEL CO.,LTD

The color coated steel plate using galvanized steel plate as the substrate, in addition to zinc protection, the organic coating on the zinc layer plays a covering and isolating role, which can prevent the steel plate from rusting, and the service life is longer than that of galvanized steel plate. It is reported that the service life of the coated steel plate is 50% longer than that of the galvanized steel plate. However, in different regions and different use parts, the service life of the color coated plate with the same galvanizing amount, the same coating, and the same coating thickness will be very different. For example, in industrial areas or coastal areas, due to the effect 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 coating will be corroded quickly when it is soaked by rain for a long time, or in the parts where the temperature difference between day and night is too large and condensation is easy, and the service life will be reduced. Buildings or factories made of color coated steel plates have a longer service life when they are often washed by rain. Otherwise, they will be affected by sulfur dioxide gas, salt and dust. Therefore, when designing, the greater the inclination of the roof, the less likely it is to accumulate dust and other dirt, and the longer the service life; for those areas or parts that are not often washed by rain, they should be washed with water regularly.