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Impedance analysis of film-forming amines for the corrosion protection of a carbon steel

Baux, Jordan and Caussé, Nicolas and Esvan, Jérôme and Delaunay, Sophie and Tireau, Jonathan and Roy, Marion and You, Dominique and Pébère, Nadine Impedance analysis of film-forming amines for the corrosion protection of a carbon steel. (2018) Electrochimica Acta, 283. 699-707. ISSN 0013-4686

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Official URL: https://doi.org/10.1016/j.electacta.2018.06.189


Octadecylamine (ODA) is a well-known organic inhibitor for the corrosion protection of carbon steels. In the present study, electrochemical impedance data analysis was performed to extract physical parameters of the ODA thin film that formed on a P275 carbon steel surface. First, surface observations and contact angle measurements showed the steel surface modification after the ODA treatment linked to the adsorption of an organic hydrophobic thin film. X-ray photoelectron spectroscopy confirmed the presence of a very thin organic layer and revealed the presence of iron oxide/hydroxide underlying the ODA film. The impedance data analysis with a power-law distribution of resistivity in the organic film allowed the permittivity and thickness to be extracted. Finally, from the impedance results with and without ODA, the instantaneous corrosion inhibition efficiency was determined.

Item Type:Article
HAL Id:hal-01883111
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > EDF (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:27 Sep 2018 14:43

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