Unravelling the corrosion processes at steel/bentonite nterfaces in in situ tests

Autor: Paul Wersin, Jebril Hadi, Mirjam Kiczka, Andreas Jenni, Jean‐Marc Grenèche, Nikitas Diomidis, Olivier X. Leupin, Daniel Svensson, Patrik Sellin, Bharti Reddy, Nicholas Smart, Zhidong Zhang
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Wersin, Paul; Hadi, Jebril; Kiczka, Mirjam; Jenni, Andreas; Grenèche, Jean-Marc; Diomidis, Nikitas; Leupin, Olivier X.; Svensson, Daniel; Sellin, Patrik; Reddy, Bharti; Smart, Nicholas; Zhang, Zhidong (2023). Unravelling the corrosion processes at steel/bentonite nterfaces in in situ tests (In Press). Materials and corrosion Wiley 10.1002/maco.202313755
Materials and Corrosion
ISSN: 0947-5117
0043-2822
1521-4176
DOI: 10.1002/maco.202313755
Popis: Microscopic and spectroscopic analyses were conducted on steel/bentonite interface samples removed from four in situ experiments that were carried out in three underground research laboratories at different temperatures and under different hydraulic and geochemical conditions. The results provide valuable information about the corrosion processes occurring in high-level radioactive waste repositories. Systematic patterns can be deduced from the results, irrespective of carbon steel grade, type of bentonite and its degree of compaction, geochemical environment or experimental setup. Thus, a clear dependence of the corrosion rates on temperature and exposure period, as well as on the availability of H2O and O2 provided by the surrounding bentonite buffer, is observed. Furthermore, Fe(II) ions released by corrosion interact with the structural Fe in the clay. Recent developments highlight the usefulness of reactive transport modelling in understanding the coupled corrosion and Fe–clay interaction processes.
Materials and Corrosion
ISSN:0947-5117
ISSN:0043-2822
ISSN:1521-4176
Databáze: OpenAIRE
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