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Electrochemical impedance spectroscopy study of the passive film for laser-beam-melted 17-4PH stainless steel

Barroux, Adrien and Delgado, Julien and Orazem, Mark E. and Tribollet, Bernard and Laffont, Lydia and Blanc, Christine Electrochemical impedance spectroscopy study of the passive film for laser-beam-melted 17-4PH stainless steel. (2021) Corrosion Science, 191. 109750. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2021.109750

Abstract

The passive films formed on laser-beam-melted (LBM) and conventional 17-4PH martensitic stainless steels were studied by electrochemical impedance measurements in a 0.5 M NaCl solution at the corrosion potential. The passive films were described as dielectric layers, and impedance data showed that the Young model was the most appropriate to describe their electrical properties. Fitting of the impedance data led to lower capacitance values, associated with a thicker oxide layer, and higher resistivity values at the oxide-electrolyte interface for the LBM samples. While the differences were subtle, impedance measurements served to explain the better pitting corrosion resistance of LBM samples.

Item Type:Article
HAL Id:hal-03352528
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Centre Technique des Industries Mécaniques - CETIM (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Sorbonne Université (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Florida (USA)
Laboratory name:
Funders:
Agence Nationale de la Recherche Technique - ANRT - University of Florida
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Deposited On:23 Sep 2021 09:50

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