Difference of HDG and GI

HDG: Also called hot dip galvanized and hot-dip galvanized: is an effective way of metal corrosion, mainly for various sectors of the metal structural steel pipe. Is immersed steel rust after about 500 ℃ melted liquid zinc, steel member attached to the surface layer of zinc, which serve the purpose of preservation.

Cold galvanized: is galvanized, zinc less, only 10-50g / m2, so is the use of electrolysis or other parts of the metal surface of the material attached to a metal film craft. The formation of uniform, dense, good adhesion of the metal layer process can serve to prevent corrosion, improve the wear resistance, electrical conductivity, reflectivity and enhance the aesthetics and so on.

Difference of HDG and GI carbon steel pipe is:
1, Different corrosion resistance, hot-dip galvanizing cold galvanizing several times.
2, On the way different jobs: HDG is 450-480 degrees in the molten liquid zinc plated zinc plating is cold at room temperature by plating zinc plating or other methods.
3, Zinc coating thickness, is far greater than the thickness of the hot-dip galvanizing cold galvanizing.
4, The surface smoothness is different than the hot-dip galvanizing cold galvanizing look nice and smooth.
5, Different prices, the price is higher than the hot-dip galvanized cold galvanizing.
6, Cold galvanizing can only plated one side, the whole quest galvanized plating.
7, Different adhesion, cold galvanizing adhesion better than galvanized.
8, Different charges, according to the thickness of the hot-dip galvanized material charges, according to the majority of cold-plated square meter charges.