The future development trend of hot-dip galvanizing

Most of the new continuous hot-dip galvanizing production lines use the improved Sendzimir process. Since the 1970s, 35 of the 43 new production lines in the world have been Sendzimir processes. Improve product quality, improve coating uniformity, improve adhesion, corrosion resistance, hot dip galvanized coating.

By using the gas jet method (air knife method) to control the coating thickness, zinc consumption can be reduced by 15%. There are 15 computer-controlled hot-dip galvanizing production lines. Develop new products such as galvanized sheets of different thicknesses, low-alloy high-strength galvanized sheets and deep-drawn galvanized sheets, and research a side hot-dip galvanizing method for the automotive industry; research spangle removal methods, which can be used for coated sheets .

Since the standard electrode potential of the hot-dip galvanized alloy layer is slightly higher than that of the pure zinc layer, its electrochemical corrosion rate is slower than that of the pure zinc layer, so its corrosion resistance is stronger than that of the hot-dip galvanized steel sheet. Because of its rough surface, it has better coating properties.