Galvanized Steel Coil/ Corrugated Roofing Sheet, Galvanized Coil

Dx51D is a galvanized steel coil material, but the most common galvanized coil material on the market is actually the Japanese standard SGCC. DX51D and DC51D are European standards. In DX51D, D stands for bending and forming grade galvanized sheet coil, and 51 stands for the serial number of steel grade, mainly based on low carbon steel.
According to the production and processing methods, it can be divided into the following categories:
a) Hot-dip galvanized steel coils. The thin steel coils is dipped into the molten zinc bath to make the thin steel coils with a layer of zinc adhered to its surface. At present, the continuous galvanizing process is mainly used for production, that is, the coiled steel sheets are continuously dipped in a galvanizing bath with molten zinc to make galvanized steel coils.
b) Alloyed galvanized steel coils. This kind of steel coil is also made by hot dip method, but it is heated to about 500℃ immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This galvanized coil has good paint adhesion and weldability;
c) Electrogalvanized steel coil. The galvanized steel coil manufactured by electroplating has good processability. However, the coating is thinner and its corrosion resistance is not as good as that of hot-dip galvanized coils.
d) Single-sided and double-sided galvanized steel coils. Single-sided galvanized steel coil, that is, a product that is galvanized on only one side. It has better adaptability than double-sided galvanized coils in terms of welding, painting, anti-rust treatment, and adding. In order to overcome the shortcomings of one side without galvanizing, there is another kind of galvanized coating with a thin layer of zinc on the other side.
Coil, that is, double-sided differential galvanized coil.
e) Alloy, composite galvanized steel coil. It is a steel coil made of zinc and other metals such as lead and zinc alloy or even composite plated. This kind of steel coil not only has excellent antirust performance, but also has good coating performance.
In addition to the above five types, there are also colored galvanized steel coils, printed and coated galvanized steel coils, polyvinyl chloride laminated galvanized steel coils, etc. But the most commonly used one is still hot-dip galvanized coil.