Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10628657 | Corrosion Science | 2005 | 29 Pages |
Abstract
The localized attack of cobalt in bicarbonate aqueous solutions containing halide ions was investigated using electrochemical techniques, scanning electron microscopy, UV-visible and Raman spectroscopies. Rotating disc and rotating ring-disc electrodes were used to determine the effect of bicarbonate concentration, solution pH, nature and concentration of the halide ions, convection and potential sweep rate on the corrosion processes. These parameters were found to play a key role on the localized attack induced by halide ions by influencing the production of a Co(HCO3)2 precipitate on the pit surface. Potentiostatically generated cobalt oxide films (CoO and Co3O4) were found to be efficient to reduce pitting corrosion of cobalt.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Danick Gallant, Stéphan Simard,