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Influence of iron corrosion on nuclear glass alteration processes: nanoscale investigations of the iron-bearing phases

Charly Carriere 1, 2, * Delphine Neff 1, 2 Eddy Foy 1, 2 Christelle Martin 3 Yannick Linard 3 Nicolas Michau 3 James Dynes 4 Philippe Dillmann 1, 2
* Corresponding author
1 LAPA - UMR 3685 - Laboratoire Archéomatériaux et Prévision de l'Altération
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
2 IRAMAT - LMC - IRAMAT - Laboratoire Métallurgies et Cultures
IRAMAT - Institut de Recherches sur les Archéomatériaux
Abstract : A carbon steel container including nuclear glass has been altered for 2 years in Andra's Underground Research Laboratory to simulate the behaviour of waste package. Post-mortem analyses at different scales (macro–micro–nano) have been performed to identify neoformed phases on iron corrosion products (ICP) and in the glass alteration layer (GAL). It has been shown at nanometric scale that important quantities of iron and silicon were found in the GAL and in the ICP respectively. Using a comparative approach with phyllosilicate references, STXM, at Si-K edge, suggests presence of trioctahedral species in the GAL and in ICP. Relevant fits of the STXM spectra are obtained with a Fe-rich chlorite for the nanostructured GAL, which could be formed according to chloritisation mechanism. ARTICLE HISTORY
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Charly Carriere, Delphine Neff, Eddy Foy, Christelle Martin, Yannick Linard, et al.. Influence of iron corrosion on nuclear glass alteration processes: nanoscale investigations of the iron-bearing phases. Corrosion Engineering, Science and Technology, Maney Publishing, 2017, 52 (sup1), pp.166 - 172. ⟨10.1080/1478422X.2017.1306962⟩. ⟨cea-01593258⟩

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