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Galvanic corrosion between zinc and carbon steel investigated by local electrochemical impedance spectroscopy

Mouanga, Maixent and Puiggali, Monique and Tribollet, Bernard and Vivier, Vincent and Pébère, Nadine and Devos, Olivier Galvanic corrosion between zinc and carbon steel investigated by local electrochemical impedance spectroscopy. (2013) Electrochimica Acta, 88. 6-14. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/j.electacta.2012.10.002

Abstract

The study of galvanic coupling between two metals is still a relevant topic, particularly in aerospace and automotive industries. The development of local electrochemical techniques leads to a better understanding of the phenomena occurring at the interfacial zone. Galvanic coupling between carbon steel and zinc was investigated by local electrochemical impedance spectroscopy (LEIS) in a 0.06 g L−1 NaCl solution. Voltammetry and conventional electrochemical impedance experiments were also performed to better analyze the local impedance data. Local measurements carried out at a fixed frequency showed that zinc dissolution was more significant at the steel/zinc interface. A particular shape of the local impedance diagram was observed above the zinc surface with the presence of a large inductive loop in the low-frequency range. Numerical simulations, performed by using finite element method, allowed the local experimental diagrams obtained over the zinc sample to be validated taking into account the radial contribution of the current between both materials in galvanic coupling.

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 Electrochimica Acta website : http://www.sciencedirect.com/science/journal/00134686
HAL Id:hal-01165531
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Arts et Métiers ParisTech (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Bordeaux (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:19 Jun 2015 10:44

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