Comparative EIS study of a paste electrode containing zinc powder in neutral and near neutral solutions |
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| Authors: | N Ibri? J Mirza-Rosca A Santana T Vi?an |
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| Institution: | (1) Department of Applied Physical Chemistry and Electrochemistry, Politehnica University of Bucharest, Romania,;(2) Departamento de Ingeniería Mecánica, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain, |
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| Abstract: | The corrosion and passivation of Zn powder particles dispersed in a paste electrode immersed in 0.5 M Na2SO4 and 5×10–3 M Na2HPO4 solutions were studied mainly by electrochemical impedance spectroscopy. The role played by diffusion in the mechanism of
anodic oxidation of zinc powder particles has been shown. It was demonstrated that the anodic reactionof Zn powder in neutral
or near neutral media involves at least two adsorbed intermediates. By simulating the porous structure of the electrode, some
information about porous nature of zinc electrode could be extracted.
Electronic Publication |
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| Keywords: | Zinc corrosion Electrochemical impedance spectroscopy Carbon paste electrode Porous structure |
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