Hot dip galvanized layer thickness, coating has a uniform, strong adhesion, long service life etc..

It is made of metal and molten iron base alloy reaction layer, thereby enabling the coating matrix and a combination of the two. Hot dip galvanized steel pipe is the first to pickling, in order to remove the steel pipe surface oxide, pickling, by ammonium chloride or an aqueous solution of zinc chloride or ammonium chloride and zinc chloride mixed aqueous solution tank for cleaning, then dipped into the hot bath. Hot dip galvanized coating has a uniform, strong adhesion, long service life etc..