How to identify the quality of color steel tile?

1. Quality appraisal of color steel tile \x0d\ 1. Whether there are obvious pores, bubbles, pile flow and wrinkling. \x0d\ 2。 Whether there are pits, impurities, scratches, dirt and uneven coating on the surface. \x0d\ 3。 Whether there is serious coating leakage, coating shedding, color mixing and adhesion. It is not allowed to make the coating brittle, yellow and dull due to excessive baking. \x0d\ 4。 No obvious color difference or uneven gloss is allowed. \x0d\ 1。 See if the paint coating on the upper and lower surfaces of the color steel tile has scratches. \x0d\ 2。 Measure whether the widths of the front and rear ends of the color steel tile are consistent, and whether the effective area and ripple height meet the standards. \x0d\ 3。 Measure whether the diagonal lengths of colored steel tiles are the same. \x0d\ 4。 Whether the color steel tile can be spread naturally on the ground. \x0d\ 5。 Whether the thickness of color steel tile meets the standard. The surface adopts hot-dip galvanized steel plate and electrostatic spray painting process, which is smooth and texture-free, with high hardness and strength, and is not easy to scratch. \x0d\ 6。 Color steel tile base thickness and paint thickness should not be too thin. The zinc content of hot-dip galvanized substrate is generally 180g/m2 (double-sided), and the highest zinc content of hot-dip galvanized substrate for building is 275g/m2. \x0d\ 7. Whether the firmness of color steel tile can withstand pressure. \x0d\ 8。 Whether multiple colored steel tiles can be completely interlocked, whether two colored steel tiles can overlap and interlock, and whether the sealing degree is intact. \x0d\ 9. By observing the coating or film thickness of products and the thickness of base plate, it is found that the coating of good aluminum gusset plate is basically only 0.02~0.03mm, and the film thickness is often less than 0. 15 mm, and the coating or film thickness of inferior color steel gusset plate is often tampered with. Usually, the thickness of the steel substrate is thinned, and several layers of paint are sprayed on the steel substrate or a very thick film is used, which is also available in the market. Too thin color steel gusset plate and too thick coating or film covering will also reduce the performance of aluminum gusset plate. \x0d\ 10, observe whether the exposed steel such as aluminum gusset plate has fine crystallization, graying, darkening and impurities. \x0d\ 1 1 When you tap the color steel gusset plate with your fingers, the metal sound of the color steel gusset plate with good material is obvious and crisp, while the metal sound of the poor material is dull but not obvious. \x0d\ 12, don't think that the lower the price, the better. As the saying goes, "buy only the wrong ones, not the wrong ones." Generally speaking, if the price is lower than that of 3 yuan, it can basically be judged as recycled steel. Even a considerable number of brands are forced by the pressure of market competition to reduce costs by selling recycled steel or OEM. Of course, we should also be wary of profiteers who shoddy goods, raise retail prices and then give consumers big discounts. Many consumers are easily deceived by this. \x0d\ 13. It is very important to care about the quality of services and auxiliary materials and understand the charging standards, because some business households in the market have received money, and their follow-up services and quality commitments are not lost. \x0d\ 2。 Color special-shaped tile is also called: color special-shaped tile, which is made of color coated steel plate and cold-rolled into various wavy special-shaped plates. It is suitable for interior and exterior wall decoration of industrial and civil buildings, warehouses, special buildings, roofs, walls and long-span steel structure houses, and has the advantages of light weight, high strength, rich colors, convenient and fast construction, earthquake resistance, fire prevention, rain protection, long service life and maintenance-free.