| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7895426 | Corrosion Science | 2015 | 9 Pages |
Abstract
The oxidation of aqueous suspensions of chukanovite (Fe2(OH)2CO3) obtained by mixing NaOH, FeCl2 and Na2CO3 solutions was studied for various [Fe2+]/[OHâ] and [CO32â]/[OHâ] concentration ratios. The redox potential of a platinum electrode immersed in the suspension was monitored during the oxidation process which reveals the presence of a plateau corresponding to equilibrium conditions between chukanovite and a poorly crystallized Fe(III) oxyhydroxide. The end products were characterized by Infrared spectroscopy and X-ray diffraction. Carbonate favoured the formation of goethite while Fe2+aq favoured lepidocrocite. This effect is mainly due to the influence of these species on the pH of the solution.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
I. Azoulay, C. Rémazeilles, Ph. Refait,