About the high temperature resistance quality of color steel coils

Color steel coil is a new type of material produced in China due to high-end applications in recent years, and is commonly referred to as CCLI. It is made of galvanized steel plate (55% aluminum, 43% zinc and 1.6% silicon) with more corrosion resistance than zinc as the substrate. After surface degreasing, phosphating, and complex acid treatment, it is coated with organic paint and baked. Color difference MAX.2.

The above data show that aluminized zinc-coated sheets (AZ150, G345A, PVDF) are very suitable for buildings or other facilities in extreme environments, with corrosion resistance and weather resistance, and all major steel mills of this type of steel plate can guarantee a service life of more than 20 years. In addition, high-strength steel plates have been widely used abroad, with good economy and domestic development trend.

Hot zinc, hot zinc iron alloy, hot galvanized aluminum alloy, hot galvanized aluminum alloy, electro-zinc. Generally used steel coils are hot zinc and hot galvanized aluminum. It cannot be distinguished by appearance, but can only be seen on the outer packaging sign of the coil. The substrate of the color steel coil is hot zinc, and the raw material of hot zinc is cold-rolled plate. A layer of zinc is plated on the cold-rolled plate to form a coil. Now zinc is generally hot zinc, and there is very little electroplating, so the steel coil is a cold-rolled plate.

When the coated steel coil for household appliances is cut and uncoiled, there is often a defect on the surface - the surface pressure spot defect. This defect is that when the color plate coating is baked and coiled after cooling, the coating surface is slightly deformed due to the coiling tension, and sometimes the surface is rough, showing a visually visible pressure spot shape. Quality in heat dissipation and high temperature resistance.

At the same time, it is also very prominent in terms of color, finish, and feel. Pay attention to the development of new coatings, and improve general polyester, polyvinylidene fluoride (PVDF) and plastic sol to obtain super color reproducibility, UV resistance, sulfur dioxide resistance, and corrosion resistance; develop functional coatings such as pollution resistance and heat absorption.