Fig. 8
Schematic corrosion mechanism of 20wt.% Cr ODS FeCrAl alloy exposed to LBE at 450 °C: (a) Initial stage showing adsorption of dissolved oxygen and the formation of Al-rich Fe-Cr spinel on surface in LBE, and also showing the formation of external FeCr2O4 after 20 h; (b) The second stage showing the growth of middle layer after 40 h; (c) Subsequent stage showing the formation of the internal mixed layer with Cr2O3 and ferrite as inner oxidation zone after 80 h; (d) Final stage showing the stable stage of multilayer oxide films after 100 h.
