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Local and global electrochemical impedances applied to the corrosion behaviour of an AZ91 magnesium alloy

Galicia, Gonzalo and Pébère, Nadine and Tribollet, Bernard and Vivier, Vincent Local and global electrochemical impedances applied to the corrosion behaviour of an AZ91 magnesium alloy. (2009) Corrosion Science, vol. 51 (n° 8). pp. 1789-1794. ISSN 0010-938X

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Official URL: http://dx.doi.org/10.1016/j.corsci.2009.05.005

Abstract

The electrochemical behaviour of an AZ91 magnesium alloy was investigated in a low aggressive medium by means of local and global electrochemical impedance measurements. The results were compared to those obtained on a pure magnesium sample. It was possible to show the individual contribution of each phase constituting the alloy, and it was observed that the corrosion mechanism of the two phases was the same, controlled by the Mg dissolution. However, local impedance diagrams clearly indicated that the kinetics dissolution of the b-phase was slower than that of the a-phase, which was in good agreement with SEM observations.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Corrosion Science website : http://www.sciencedirect.com/science/journal/0010938X
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Nihad Lahdifi

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