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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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 1MB |
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 - Toulouse INP (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) |
| Laboratory name: | |
| Funders: | ANR |
| Statistics: | download |
| Deposited On: | 01 Sep 2017 13:51 |
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