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Etude des potentialités des techniques électrochimiques et de l’émission acoustique pour la détection et la surveillance de la corrosion des structures métalliques

Abstract : This work takes part of the SCCoDRa project (Monitoring and Control of Corrosion of Metal Components for the Storage of Radioactive Waste). The study aims to contribute to proposals for combinations of techniques capable of providing additional information for the detection and the monitoring of localized and uniform corrosion of carbon steel. First, the potentials of Electrochemical Noise Measurements (ENM) and Acoustic Emission (AE) were studied for the detection, the identification and the monitoring of localized corrosion of carbon steel. Ca(OH)2,sat and NaHCO3 media containing chloride ions were used in order to activate the corrosion and obtain corroded sites of millimeter size over short immersion times. The tests carried out in these environments have made it possible to define the contribution and limits of each technique. Secondly, several electrochemical techniques such as Harmonic Distorsion Analysis (HDA), electrochemical noise, Linear Polarization Resistance (LPR) and Electrochemical Impedance Spectroscopy (EIS) were used to monitor the uniform corrosion rate of a carbon steel when it is immersed in a saline solution under a CO2 atmosphere.
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https://tel.archives-ouvertes.fr/tel-03406791
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Submitted on : Thursday, October 28, 2021 - 9:29:51 AM
Last modification on : Friday, October 29, 2021 - 3:58:18 AM

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  • HAL Id : tel-03406791, version 1

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Chloé Comas. Etude des potentialités des techniques électrochimiques et de l’émission acoustique pour la détection et la surveillance de la corrosion des structures métalliques. Matériaux. Université de Lyon, 2021. Français. ⟨NNT : 2021LYSEI039⟩. ⟨tel-03406791⟩

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