Experimental verification of models assessing Eh evolution induced by corrosion of carbon steel overpack. (September 2014)

• Record Type: Journal Article
• Authors: Sakamaki, K.; Kataoka, M.; Maeda, T.; Iida, Y.; Kamoshida, M.; Yamaguchi, T.; Tanaka, T.
• Is Part Of: Corrosion engineering, science, and technology. Volume 49:Number 6(2014)
• Page Start: 450
• Page End: 454
• Publication Date: 2014-09
• Subjects: Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1179/1743278214Y.0000000217
• Languages: English
• ISSNs: 1478-422X

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Corrosion experiments of a carbon steel plate embedded in bentonite mixture were conducted to verify our models assessing Eh evolution induced by corrosion of carbon steel overpack. The experimental results showed that the Eh decreased for the first 200 days and was subsequently stabilised at around −450 mV; corrosion products were identified as magnetite and Fe was present mostly as divalent Fe within a 5 mm range from the carbon steel plate. Reactive transport modelling was performed to assess the Eh evolution in the system using kinetic dissolution model for metallic iron and thermodynamic equilibrium models for other chemical reactions and closely reproduced the experimental results. The models were verified only under the conditions employed in this study.</p> </abstract>