Heterogeneous corrosion of carbon steel used for casing in deep geological radioactive waste repository in contact with claystone
The corrosion of C-steel in contact with the Cox claystone was studied under aerated conditions at 50°C, for 7 years, in a simplified laboratory experiment. A multi-scale and multi-technique approach, including SEM-EDX, Raman spectroscopy and STXM, was used to determine the nature and structure of the corrosion products and to better understand the mechanisms involved in the observed degradation. The effects of temperature, oxygen supply and the local influence of the composition and density of the claystone were examined here. • Corrosion products were mainly composed of goethite. • Sulphides formed on the bare metal surface even in aerated conditions. • Samples closer to the oxygen source were heavily corroded. • Dense claystone favoured the formation of phyllosilicates in the goethite matrix.
Authors
- Didier Crusset (ORCID: https://orcid.org/0000-0003-2177-5342)
- Franck Agostini (ORCID: https://orcid.org/0000-0003-4176-9564)
- Nicolas Michau (ORCID: https://orcid.org/0000-0001-8387-4093)
- Annabelle Vernouillet
- Eddy Foy (ORCID: https://orcid.org/0000-0002-1381-2767)
- James J. Dynes (ORCID: https://orcid.org/0000-0002-5727-530X)
- Valérie Maillot (ORCID: https://orcid.org/0000-0003-3372-848X)
- Xavier Bourbon
- Philippe Dillmann
- Delphine Neff
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université de Lille (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Université Paris-Saclay (FR)
- Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux (FR)
- Institut de Recherche sur les ArchéoMATériaux (FR)
- Laboratoire Archéomatériaux et Prévision de l'Altération (FR)
- Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion (FR)
- CEA Paris-Saclay (FR)
- Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Énergie (FR)
- Agence Nationale pour la Gestion des Déchets Radioactifs (FR)
- Laboratoire de Mécanique, Multiphysique, Multiéchelle (FR)
- École Centrale de Lille (FR)
- Canadian Light Source (Canada) (CA)
Publication Details
- Journal
- Corrosion Science
- Published
- 2024-09-20
- DOI
- https://doi.org/10.1016/j.corsci.2024.112472
- Citations
- 4
- Primary Topic
- Hydrogen embrittlement and corrosion behaviors in metals
- Type
- article
- Field-Weighted Citation Impact
- 0.69
Funders
- Agence Nationale pour la Gestion des Déchets Radioactifs