Abstract
The corrosion behaviour of stoichiometric Fe3Si alloy in a liquid zinc bath for 3 and 62 h at 500°C was examined. The corrosion products at the Fe3Si/liquid zinc interface were investigated by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The corrosion process was controlled by the diffusion of iron and zinc atoms. There were scarcely any silicon atoms diffusing at Fe3Si/liquid zinc interface from the matrix to liquid zinc. The phase transition process of the stoichiometric Fe3Si alloy in liquid zinc was Fe3Si, α, α+ FeSi+δ, FeSi+δ, and the main corrosion products were periodic array of FeSi and δ phase.
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