Effect of Alloying Element on Microstructure and Corrosion Resistance of Fe-2.5B Alloy in Moltening Zn

According to the problem of the moltening zinc-corrosion to materials in the hot-dip galvanizing industry, the changes of microstructure, corrosion resistance to molten zinc and mechanical properties were studied by adding C, Si, Mn alloying element into Fe-2.5B alloy. The results show that the corrosion resistance of Fe-2.5B-1C in moltening Zn increases about 9 times, but bending strength decreases half when adding 1%C. The α phase and dense eutectic structure reduce when adding 1% Si and 1% Mn. The corrosion resistance to molten zinc and mechanical properties have different improvement.