alu-zinc alloy coated steel sheet and various galvanized steel components often appear in buildings as functional auxiliary materials, hidden behind various finishes.
alu-zinc alloy coated steel sheet can be divided into electro-galvanized and hot-dip galvanized in terms of production process. In simple terms, electro-galvanizing refers to the electrolytic reaction in the solution with the help of external direct current to deposit a layer of metal or alloy layer (zinc) on the surface of the steel plate (conductor metal); hot-dip galvanized steel is a cold and hot rolled steel strip It is produced for the substrate through a continuous hot-dip galvanizing process, and its corrosion resistance exceeds that of electro-galvanized varieties, and it is also the most commonly used in construction. Due to the protective properties of zinc, the thickness of the coating has become one of the indicators for evaluating galvanized steel sheets.
The crystalline pattern of the coating metal appears on the surface of the hot-dip coating during solidification. The size of the crystalline pattern is related to the type and content of other alloying elements in the zinc bath, the number of crystalline nuclei, the thickness and smoothness of the original plate, the thickness of the zinc coating, and the size of the spangle crystals. alu-zinc alloy coated steel sheet for sale Factors such as growth time are related. Early galvanized steel sheets often showed dark spangles due to lead mixed in the zinc solution, and modern galvanized steel sheets often showed a silver-white bright effect due to the control of the coating alloy.