Disappearance behavior of the Fe-Al interface layer of galvanized steel sheets

Abstract

The variation of aluminum content at the interface between the zinc coating and the steel substrate, which corresponds to the quantity of the Fe-Al interface layer, with dipping time in a molten zinc bath was measured quantitatively with inductively coupled plasma optical emission spectrometry. Comparing the aluminum content between the sample dipped in the Zn-0.14mass%Al bath and that dipped in the Zn-0.18 mass%Al bath, it was found that the Fe-Al interface layer disappeared with linear relationship with dipping time in the Zn-0.14 mass%Al bath. This suggests that the disappearance behavior of the Fe-Al interface layer was dominated by an interface reaction.