Corrosion of Metals by Molten Zinc and the Countermeasure

The influence of C and Si in steels on their corrosion resistance tO molten Zinc is studied according to the corrosion mechanism of iron by molten Zinc. It shows that C and Si are the promoting elements, that is to say, the more of C and Si in steel, the lower of it's resistance to molten Zinc. At the same time, it is gotten that the layer of borurization has good resistance to molten Zinc and it is a good material to keep iron apart from it. In order to decrease the corrosion of metals by molten Zinc, the steel of equipment for hot Zinc-plating should be chosen which has low C and Si; moreover low temperature of molten Zinc and borurization treatment are essential.