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Electrodissolution de la millérite en milieu chlorhydrique

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Résumé

L'électrodissolution deβMS synthétisé a été étudiée en milieu d'acide chlorhydrique à 25° C. L'influence de la concentration des ions d'hydrogène (pH 0.46–2.68), de nickel (0–1 M) et de chlore (1–4 M) a été examinée. Les études potentiocinétiques et potentiostatiques ainsi que les diagrammesE-pH de NiS-H2O ont clarifié la cinétique électrochimique et le mécanisme de dissolution deβNiS. La surface attaquée et les produits de corrosion ont été examiné par rayons-X, microscopie électronique à balayage, dispersion des rayons-X et absorption atomique.

Abstract

The electrodissolution of syntheticβMS has been studied in hydrochloric acid at 25° C. The influence of hydrogen ions (pH 0.46–2.68), nickel ions (0–1 M) and chloride ions (1–4 M) has been examined. Potentiokinetic and potentiostatic studies and alsoE-pH diagrams of NiS-H2O clarified the electrochemical kinetics and mechanism of the dissolution ofβNiS. The attacked surface and dissolution products were examined by X-rays, scanning electron microscopy, X-ray dispersion and atomic absorption.

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Authors and Affiliations

  1. Centre de Recherches du Moyen Nord, Université du Québec à Chicoutimi, Québec, Canada

    E. Ghali (Actuellement professor d'électrométallurgie), A. Maruejouls & D. Deroo (Maître assistant)

  2. Département de mines et métallurgie, Université Laval, Québec, Canada

    E. Ghali (Actuellement professor d'électrométallurgie)

  3. Laboratoire d'énergétique électrochimique, Ecole National d'électrochimie et d'électrométallurgie, BP 44, Grenoble, France

    D. Deroo (Maître assistant)

Authors
  1. E. Ghali
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  2. A. Maruejouls
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  3. D. Deroo
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Ghali, E., Maruejouls, A. & Deroo, D. Electrodissolution de la millérite en milieu chlorhydrique. J Appl Electrochem 10, 709–719 (1980). https://doi.org/10.1007/BF00611274

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  • DOI: https://doi.org/10.1007/BF00611274

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