Interface characterization and erosion-corrosion behavior of directional Fe-3.5 wt.% B steel in flowing liquid zinc at various temperatures

The interface characterization and erosion-corrosion behavior of directional Fe-3.5 wt.% B steel in the flowing zinc at 460-550 °C were investigated. The result indicated that directional Fe-3.5 wt.% B steel possesses better erosion-corrosion resistance to liquid zinc with the [0 0 2] orientation of Fe₂B boride perpendicular to the erosion-corrosion interface. Liquid zinc temperature, Fe₂B orientation in steel, and micromechanical scour have a significant effect on erosion-corrosion interface structure, which in turn governs the corrosion behavior of the matrix by influencing the dissolution and diffusion process, erosion-enhanced corrosion, the Fe₂B boride failure mode, and further erosion-corrosion resistance.