The types of galvanized products used for building color coated substrates include galvanized and alloy coated products, and their performance differences and uses are as follows:
The hot dip galvanizing referred to here refers to the hot dip pure zinc plating, which is the most widely used in construction. Before it was used as a color coated substrate, it was widely used in the construction industry and is currently the main variety of color coated substrates for construction. Excellent corrosion resistance. Suitable for making building exterior panels. It can perform various levels of processing such as general forming, stamping, and deep stamping.
Electrogalvanizing
The purity of the coating is high, therefore, the corrosion resistance of the coating under the same thickness is better than that of hot-dip galvanized products. According to the test, under the same conditions, according to the American standard (ASTM B 114), the red rust resistance time of one micron coating is 12 hours for electrogalvanizing, while less than 10 hours for hot-dip galvanizing. However, obtaining a thick zinc plating layer is difficult (high power consumption, high cost, and technical difficulty). As a color coated substrate, the use of zinc plating is mainly applied to household appliances, steel furniture, doors and windows, etc.
Production process
Hot dip galvanized steel plate is a coated steel plate obtained by immersing pre treated steel strips into molten zinc solution. The common NOF hot dip galvanizing process now generally includes cleaning, annealing, hot dip galvanizing, alloying, leveling, tension straightening, chemical treatment, surface inspection, oil coating and other main processes in the hot dip galvanizing unit.
