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Journal of Applied Electrochemistry

, Volume 17, Issue 4, pp 779–788 | Cite as

Electrochemical behaviour of copper in aqueous solution containing potassium ethylxanthate

  • J. Gomez Becerra
  • R. C. Salvarezza
  • A. J. Arvia
Papers

Abstract

The electrochemical behaviour of copper in aqueous potassium ethylxanthate (KEX) is studied by using potentiodynamic techniques at different sweep rates, complemented with SEM and EDAX. In NaCl solutions a cuprous xanthate film is formed at low potentials, the initial stage of this reaction being the electroadsorption of KEX on copper competing with the adsorption of chloride ions and water. At low surface coverages for electroadsorbed KEX the electrodissolution of copper is partially inhibited as compared to plain NaCl solutions. As the KEX monolayer is completed, a tri-dimensional cuprous xanthate film grows in the electrode surface. On subsequent increase of the applied potential a complex anodic layer is formed leading to copper passivity. Passivity breakdown promoted by either chloride ions or electro-oxidation of the organic film can be observed when the potential exceeds a certain critical value.

Keywords

Copper Applied Potential Electrode Surface Surface Coverage Electrochemical Behaviour 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1987

Authors and Affiliations

  • J. Gomez Becerra
    • 1
  • R. C. Salvarezza
    • 1
  • A. J. Arvia
    • 1
  1. 1.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)La PlataArgentina

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