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The Impact of Cementitious Materials on the Corrosion of Copper Canisters

Published online by Cambridge University Press:  01 February 2011

Fraser King  and
Lars Werme
Fraser King
Affiliation:
Integrity Corrosion Consulting Ltd, 6732 Silverview Drive NW Calgary, Alberta, Canada T3B 3K8
Lars Werme
Affiliation:
Svensk Kärnbränslehantering AB, Box 5864, SE-102 40 Stockholm, Sweden
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Abstract

Cementitious materials could be used in an underground repository as seals, bulkheads, grouts, or to provide a smooth surface for vehicles in the rooms and tunnels during repository construction. There is a possibility that an alkaline plume could be released from the cementitious materials in the repository and impact the corrosion behaviour of the canisters. The available literature information on the corrosion and electrochemical behaviour of copper in alkaline environments has been reviewed. Alkaline conditions promote passivation of the canister, whereas the presence of chloride groundwaters supports general dissolution. Localized corrosion due to an alkaline plume is considered to be unlikely because the protectiveness of the passive film (as measured by the difference between the corrosion and pitting potentials) increases with increasing pH.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 471
Copyright
Copyright © Materials Research Society 2004

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References

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