Erosion-corrosion interaction of Fe-B alloy in flowing zinc

The effect of erosion angle on the erosion-corrosion interaction of Fe-3.5 wt-%B alloy in flowing zinc was investigated. The total erosion-corrosion rate decreased linearly, whereas the pure erosion rate fluctuated slightly with increasing erosion angle, which was strongly dependent on the erosion-corrosion interaction. At an erosion angle of 0°, liquid zinc corrosion damaged the sample surface and facilitated erosion, which in turn increased corrosion via the removal of corrosion products. As the erosion angle increased, corrosion products accumulated and Fe₂B flaked and cracked in front of the erosion interface, which resulted, in turn, in increased obstruction to the diffusion of liquid zinc. Accordingly, the erosion-corrosion interaction was reduced, thereby resulting in a low material loss at high erosion angles.