Fig. 8: Corrosion behavior and composition variation of Al2O3-containing inclusions in steel. | npj Materials Degradation

Fig. 8: Corrosion behavior and composition variation of Al2O3-containing inclusions in steel.

From: A critical review of the recent advances in inclusion-triggered localized corrosion in steel

Fig. 8

a, c Typical SEM images. b Cross-sectional images and (a1, a2, b1, b2, b3) corresponding element distribution of the steel containing oxide spinel inclusions (Al-killed steel containing Al2O3 inclusions immersed in 1 M NaCl + 0.5 M Na2SO4 + 0.5 M CaCl2 for 30 min was shown in a–b3, while X70 steel containing complex xCaS·yMgO·zAl2O3 inclusions immersed in 0.0111 M CaCl2 + 0.0468 M NaCl + 0.0142 M Na2SO4 + 0.0197 M MgSO4·7H2O + 0.0293 M KNO3 + 0.0151 M NaHCO3 for 10 min was depicted in c) after removal of corrosion product24,84.

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