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On the stability of the oxides film formed on a magnesium alloy containing rare-earth elements

Leleu, Samuel and Rives, Bertrand and Bour, Jérôme and Caussé, Nicolas and Pébère, Nadine On the stability of the oxides film formed on a magnesium alloy containing rare-earth elements. (2018) Electrochimica Acta, 290. 586-594. ISSN 0013-4686

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Official URL: https://doi.org/10.1016/j.electacta.2018.08.093

Abstract

The electrochemical behaviour of a commercial magnesium alloy containing rare-earth elements, the WE43, was investigated by electrochemical techniques in both sulphate and chloride solutions and compared to that of pure magnesium (99.95 wt %). A particular attention was paid to the oxides film that formed during the corrosion process. Electrochemical impedance data analysis allowed the oxides films thickness to be determined. The film was thinner and more protective for the WE43 Mg alloy than for the pure Mg. ToF-SIMS analysis showed the incorporation of alloying elements, mainly yttrium and zirconium in the corrosion products layer. A higher compactness due to a higher Pilling-Bedworth ratio can explain the electrochemical results.

Item Type:Article
HAL Id:hal-01880762
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > IRT Saint Exupéry - Institut de Recherche Technologique (FRANCE)
Other partners > Luxembourg Institute of Science and Technology - LIST (LUXEMBOURG)
Laboratory name:
Funders:
IRT Saint-Exupery Surfinnov project partners - Mapaero and Prodem companies
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Deposited By: Diane SAMELOR
Deposited On:25 Sep 2018 08:40

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