Localized electrochemical impedance spectroscopy study on the corrosion behavior of Fe-Cr alloy in the solution with Cl− and SO4 2−

Effect of iron ion diffusion on the corrosion behavior of carbon steels in soil environment

“…Typically, the formation of corrosion products of carbon steels and their transformation were different in different media. Previous research 21 had demonstrated that in neutral environments, the primary corrosion product was g-FeOOH, which gradually transformed into g-Fe 2 O 3 , which was more stable. Because the crystal structure of FeOOH was poor, the FeOOH tended to transform into Fe 2 O 3 , and the formula for this transformation is…”

“…6(a). According to the values for Raman peaks of iron compounds given in previous studies, 20,21 the corrosion products could be identied as follows. The peaks appearing at 250, 526, 651, 1050 and 1304 cm À1 are the characteristic peaks of g-FeOOH, while the peaks at 310 and 341 cm À1 are the characteristic peaks of g-Fe 2 O 3 .…”