On corrosion of carbon steels in Callovo-Oxfordian clay: complementary EIS, gravimetric and structural study providing insights on long term behaviour in French geological disposal conditions
| Autor: | Michel L. Schlegel, M. Fenart, C. Bataillon, Stéphane Perrin, F. Martin |
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| Přispěvatelé: | Laboratoire d'Etude de la Corrosion Aqueuse (LECA), Service de la Corrosion et du Comportement des Matériaux dans leur Environnement (SCCME), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département de Physico-Chimie (DPC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, laboratoire d'ingénierie des surfaces et lasers (LISL), Service d'études analytiques et de réactivité des surfaces (SEARS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]
Materials science General Chemical Engineering Diffusion Metallurgy Extraction (chemistry) chemistry.chemical_element General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] Dielectric spectroscopy Corrosion Barrier layer Flux (metallurgy) chemistry 13. Climate action [CHIM.ANAL]Chemical Sciences/Analytical chemistry Gravimetric analysis [SHS.GESTION]Humanities and Social Sciences/Business administration General Materials Science Carbon ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Corrosion Engineering, Science and Technology Corrosion Engineering, Science and Technology, Maney Publishing, 2014, 49 (6), pp.460-466. ⟨10.1179/1743278214Y.0000000181⟩ Corrosion Engineering, Science and Technology, 2014, 49 (6), pp.460-466. ⟨10.1179/1743278214Y.0000000181⟩ |
| ISSN: | 1478-422X 1743-2782 |
| DOI: | 10.1179/1743278214Y.0000000181⟩ |
| Popis: | Dedicated integrated experiments have been used to determine in situ the corrosion rate of carbon steels in geological repository mock-ups (90°C, anaerobic, slow synthetic water flux…). Electrochemical impedance spectroscopy (EIS) measurements were performed, allowing for the extraction of instantaneous corrosion rate. In a separate but comparable set-up, occasional sampling among a batch of fifteen equivalent cells was performed, allowing for both gravimetric measurements and corrosion products characterisation. In both cases, the corrosion rate decreases continuously but the stationary state seems not to be reached within the duration of the EIS experiment. The slow kinetics and pseudo steady state of the corrosion process are confirmed by post-exposure characterisation of the corrosion products by SEM, micro-Raman spectroscopy and micro-XRD, revealing the rapid formation of an iron phyllosilicate layer that may act as a barrier layer for diffusion of the species between the clay environment and... |
| Databáze: | OpenAIRE |
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