Modeling of Interfacial Layer Growth Kinetics on Mn-Containing Steels during Continuous Hot-Dip Galvanizing

A kinetic model based on an oxide film growth analogy was developed to describe the continuous galvanizing Fe-Al interfacial layer growth for 0.2 – 3.0 wt% Mn-containing steels coated in 0.20 wt% and 0.30 wt% dissolved Al baths. It indicated that interfacial layer microstructural development and the presence of unreduced surface MnO had a significant influence on the interfacial layer growth rate. However, in the cases of the higher Mn steels …