Obtainment of Zinc-containing Rare Earth Alloy Coating of Hot-galvanized Steel Tube

Based on the convenient steel tube hot galvanizing process,the zinc-containing rare earth alloy coatings with different properties of the galvanized tube are obtained by means of preparing galvanizing baths with different proportions of the rare earth alloy elements. Studies are conducted on such aspects of each coating,including thickness,surface morphology,alloy composition and corrosion resistance. The result demonstrates that in case of 0.05% -0.10% rare earth mass fractiont,the coatings will be in possession of compact surface structure without any obvious defect,and uniform thickness and excellent corrosion-resistance.