Abstract
The dynamic sessile drop method was used to study the wetting behavior of galvanized steel by molten Mg AZ61 alloy under cold metal transfer condition. The interfacial microstructures were also analyzed by using scanning electron microscope and energy dispersive spectrometry. The observed results showed that the wetting behavior was directly determined by the wire feed speed (or the heat input). The Al-Fe intermetallic layer and Zn-rich zone were observed both at the interface and at the close of triple line. The formations of these interfacial characteristics satisfy the thermodynamic characteristic of Mg-Al/Fe and Mg-Zn/Fe systems.
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