The hot dip galvanized steel coil for sale has many functions, but it also has its shortcomings, including easy to fall off, easy to scratch during construction, zinc particles, air knife streaks, exposed steel, mechanical damage, wave edge, dimensional mismatch, steel-based properties Bad, roller printing, etc.

There are many reasons for the galvanized layer falling off, including surface oxidation, the cold emulsified emulsion is too dirty, the protective gas dew point is too high, hydrogen flow is low, and oil evaporation is not enough, so it is necessary to observe galvanizing in the purchase. Whether the surface of the steel plate is intact.