Surface-enhanced Raman spectroelectrochemical studies of corrosion films on iron in aqueous carbonate solution
Journal Article
·
· Journal of the Electrochemical Society
- Argonne National Lab., IL (United States)
The corrosion films on iron in aqueous carbonate/bicarbonate solutions were studied as a function of concentration, pH, and temperature by using the technique of surface-enhanced Raman spectroscopy with electrodeposited silver. Both Fe(OH){sub 2} and Fe{sub 3}O{sub 4} were detected in the surface oxide film at prepassivation potentials. Iron carbonate (siderite) was observed in the corrosion film in a limited pH, temperature, and applied potential range. At lower carbonate/bicarbonate concentration (e.g., 0.01 M), passivation was lost, and continuous anodic dissolution of the iron occurred. The cathodic reduction of the corrosion film was enhanced at 75 C.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 367763
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 7 Vol. 143; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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