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Electrochemical characterisation of a martensitic stainless steel in a neutral chloride solution

Marcelin, Sabrina and Pébère, Nadine and Régnier, Sophie Electrochemical characterisation of a martensitic stainless steel in a neutral chloride solution. (2013) Electrochimica Acta, 87. 32-40. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/j.electacta.2012.09.011

Abstract

This paper focuses on the characterisation of the electrochemical behaviour of a martensitic stainless steel in 0.1 M NaCl + 0.04 M Na2SO4 solution and is a part of a study devoted to crevice corrosion resistance of stainless steels. Polarisation curves and electrochemical impedance measurements were obtained for different experimental conditions in bulk electrolyte. X-ray photoelectron spectroscopy (XPS) was used to analyse the passive films. At the corrosion potential, the stainless steel was in the passive state and the corrosion process was controlled by the properties of the passive film formed during air exposure. During immersion in the deaerated solution, the passive film was only slightly modified, whereas it was altered both in composition and thickness during immersion in the aerated solution. After cathodic polarisation of the stainless steel electrode surface, the oxide film was almost totally removed and the surface appeared to be uniformly active for oxygen reduction. The new passive film, formed at the corrosion potential, was enriched with iron species and less protective. Impedance diagrams allowed the characterisation of both the oxide film (high-frequency range) and the charge transfer process (low-frequency range).

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 : http://www.sciencedirect.com/science/journal/00134686
HAL Id:hal-01165618
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 > Institut Catholique des Arts et Métiers - ICAM (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:19 Jun 2015 13:39

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