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A Kelvin probe force microscopy study of hydrogen insertion and desorption into 2024 aluminum alloy

Lafouresse, Manon Chloé and Bonfils-Lahovary, Marie-Laëtitia de and Charvillat, Cédric and Oger, Loïc and Laffont-Dantras, Lydia and Blanc, Christine A Kelvin probe force microscopy study of hydrogen insertion and desorption into 2024 aluminum alloy. (2017) Journal of Alloys and Compounds, 722. 760-766. ISSN 0925-8388

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2017.06.143

Abstract

Hydrogen was inserted into 2024 aluminum alloy by cathodic polarization in sulfuric acid at 25 °C. Scanning Kelvin Probe Force Microscopy (SKPFM) measurements performed perpendicularly to the charging side revealed a potential gradient and confirmed the insertion of hydrogen over hundreds of microns. A hydrogen diffusion coefficient of 1.7 x 10-9 cm2 s-1 was calculated from SKPFM measurements of H-charged samples for different durations. The evolution of the potential gradient during desorption of hydrogen in air, at room temperature and at 130 °C was investigated. Additional experiments performed at a corrosion defect showed that SKPFM could detect both reversibly and irreversibly bounded hydrogen. These results show that SKPFM is a cutting-edge technique for hydrogen detection and localization at a local scale

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at http://www.sciencedirect.com/science/article/pii/S0925838817321424
HAL Id:hal-01627635
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)
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Deposited By: cirimat webmestre
Deposited On:01 Sep 2017 13:51

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