Figure 8

Surface morphologies (a) and cross-sectional morphologies (b) and the high magnification image (c) of the pre-oxidized samples after corrosion in NaCl + H2O + O2 at 600 ˚C for 20 h.

Surface morphologies (a) and cross-sectional morphologies (b) and the high magnification image (c) of the pre-oxidized samples after corrosion in NaCl + H2O + O2 at 600 ˚C for 20 h.