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- W2000454894 abstract "In situ surface enhanced Raman spectroscopy was employed to study the effect of dissolved oxygen (DO) on the composition of the corrosion film formed on a low carbon steel surface in 0.01 M NaCl solution. Raman spectra were taken during cyclic voltammetric and potential step experiments. The spectra taken during cyclic voltammetry were similar to those previously obtained for passive iron. It showed a peak for a trivalent species at 670 cm−1 in the passive potential range, which was usually assigned to FeOOH rather than to γ-Fe2O3. However, in the spectra taken during potential step experiments, it was apparent that the main trivalent species in the corrosion film was γ-Fe2O3 at 640, 670, 715 cm−1, and DO behaved as an oxidizer to convert iron from the divalent state in Fe3O4 to the trivalent state (γ-Fe2O3). The presence of γ-Fe2O3 in the corrosion film on iron was detected for the first time by taking SER spectra during potential step experiments. Though this film showed a weak protective property, and had corrosion products due to pitting induced by chloride ions, the detection of γ-Fe2O3 supports the previous ex situ and in situ findings that the trivalent oxide in iron passivity is γ-Fe2O3." @default.
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- W2000454894 date "2001-04-01" @default.
- W2000454894 modified "2023-10-14" @default.
- W2000454894 title "In situ surface enhanced Raman spectroscopic study on the effect of dissolved oxygen on the corrosion film on low carbon steel in 0.01 M NaCl solution" @default.
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- W2000454894 doi "https://doi.org/10.1016/s0013-4686(01)00442-x" @default.
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