Fig. 7: Corrosion evolution and corresponding characterization of MnS-containing inclusions in aggressive condition.
From: A critical review of the recent advances in inclusion-triggered localized corrosion in steel
a, a1, a2, a3 HAADF images and its partial enlarged views at various locations showing: a, a1 An MnS inclusion section in stainless steel, where different positions containing MnS inclusions a, a2 before and a1, a3 after exposure in 1 M NaCl solution for 45 min are labeled with I, II, III, IV, and V, and marked with blue and green arrows, respectively. a4 Three-dimensional reconstruction morphology of each domain after corrosion. Morphology and elemental distribution results of MnS inclusions in stainless steel alloyed with Cu element b, b1 before and c, c1 after immersion in 1 M NaCl solution for 35 min. d A high-resolution TEM images of corroded sites containing MnS inclusions and d1, d2, d3electron diffraction patterns taken in the d1 dissolution pit, d2 at the pit boundary and d3 the region far away from the pit, respectively, after immersion in 1 M NaCl solution for 35 min, e a zoom-in image of the produced Cu2S nanowires around the pit and f a NBED pattern taken along the [−1 1 0] direction of Cu2S66,80.
