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Interfacial layers at a nanometre scale on iron corroded in carbonated anoxic environments

Yoanna Leon 1, 2 Philippe Dillmann 1, 2 Delphine D. Neff 1, 2 Michel L Schlegel 3 Eddy Foy 1, 2 James J Dynes 4 
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 : Two tests of iron corrosion in compacted clay and clay slurry were performed for several years. The corrosion systems, and especially the interfacial layer between the metal and the corrosion products, were investigated post mortem by SEM-FEG, mRaman, MET and STXM. An Fe(III) oxide layer systematically developed at a nanometer scale between the metal and an outer layer of carbonates. Its presence could explain the slowing down of the corrosion rate usually observed for these systems. Depending of the compactness of the environment the nature of the interfacial layer is not the same.
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Submitted on : Wednesday, April 19, 2017 - 12:15:48 PM
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Yoanna Leon, Philippe Dillmann, Delphine D. Neff, Michel L Schlegel, Eddy Foy, et al.. Interfacial layers at a nanometre scale on iron corroded in carbonated anoxic environments. RSC Advances, Royal Society of Chemistry, 2017, 7, pp.20101 - 20115. ⟨10.1039/C7RA01600J⟩. ⟨cea-01510267⟩



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