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Monitoring the Galvanic Corrosion of Copper–steel Coupling in Bentonite Slurry During the Early Oxic Phase Using Coupled Multielectrode Arrays by Tadeja Kosec; Miha Hren; Klara Prijatelj; Bojan Zajec; Nina Gartner; Andraž Legat is a Materials Science article available to read on EtoBox.

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In the case of a two-part container for spent nuclear fuel, consisting of an ironbased inner structure with a copper coating, the potential perforation of copper through minor damage may result in intensive galvanic corrosion between copper and steel. The present work focuses on the corrosion of steel galvanically coupled to copper and exposed to a slightly saline environment under oxic conditions. The electrochemical processes on individual electrodes were monitored by coupled multielectrode arrays (CMEAs). The CMEAs were either in contact with groundwater saturated with bentonite or immersed in groundwater only. Very high galvanic corrosion currents were detected between carbon steel and pure copper in the early oxic phase. Additionally, the use of CMEAs further made it possible to monitor the distribution of cathodic currents around the steel electrode, which behaved anodically. Various microscopy and spectroscopy techniques were applied to identify the modes of corrosion and the type of corrosion products present at the end of the period of exposure.

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Author

Tadeja Kosec; Miha Hren; Klara Prijatelj; Bojan Zajec; Nina Gartner; Andraž Legat

Publisher

Wiley

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)