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- Title
Experimental factors and their impact on understanding corrosion in anoxic environments.
- Authors
Senior, Nicholas; Martino, Taylor; Gaggiano, Roberto; Diomidis, Nikitas
- Abstract
The long‐term disposal of nuclear waste in deep geological repositories requires safe containment for up to one million years. To understand how the waste will respond to the gradually evolving environment, researchers can perform sensitive experiments in the laboratory to replicate the repository conditions at specific time points. In Belgium, spent nuclear fuel will be housed within a carbon steel overpack, which is encased within a cement buffer, which may include a stainless steel liner (the "envelope"). The range of corrosion behaviors for carbon steel, and to a lesser extent, stainless steel, has been studied through hydrogen evolution, an end‐product of oxidation under repository conditions. Considerable time may be required for metallic surfaces to approach a steady hydrogen evolution and this is dependent upon the starting condition of the specimen surfaces. The use of nominally‐similar materials can result in significant variation in the reported corrosion rates. The presence of cements, which generate their own hydrogen and influence water chemistry as a function of time, add complexity to even simple experimental configurations that requires careful interpretation.
- Subjects
BELGIUM; RADIOACTIVE waste disposal in the ground; ANOXIC zones; GEOLOGICAL repositories; RADIOACTIVE waste repositories; CARBON steel corrosion; CARBON steel; METALLIC surfaces
- Publication
Materials & Corrosion / Werkstoffe und Korrosion, 2023, Vol 74, Issue 11, p1746
- ISSN
0947-5117
- Publication type
Article
- DOI
10.1002/maco.202313771