The reaction of the sulphite/bisulphite couple on SMO steel under anaerobic conditions

✍ Scribed by Tor Hemmingsen; Torstein V»land

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 785 KB
• Volume: 36
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(91)80018-4

✦ Synopsis

The reactions of sulphite ions on SMO steel have been studied under anaerobic conditions in a 0.5 M NaCl solution adjusted to pH = 7. The solution is purged with nitrogen, and kept under nitrogen atmosphere during measurements. The study has been performed with rotating disk electrodes and a quasi-potentiodynamic technique has been used.

The results show that the reduction of the sulphite ions, probably to dithionite ions, is the dominant reaction. In the anodic direction the passive current through the oxide layer is dominant.