In this study, the ZnFe coated boron steel specimens were treated by rapid heating at different heating rates from 20 °C/s to 100 °C/s. The coating morphologies and phase compositions were characterized to investigate the influence of heating rate on phase transformation of ZnFe coating. The results indicated that there was no continuous α-Fe(Zn) layer formed at coating/substrate interface during the heating-up stage when the heating rate was higher than 50 °C/s. As a result, the phase transformation of the coating was facilitated. At the heating rate of 100 °C/s, a one-layer coating structure composed of α-Fe(Zn) phase was formed within 100 s, which is significantly shortened compared to the traditional furnace heating method.

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