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Corrosion of Waste Glasses in Boom Clay: Studies of Element Concentrations by Sims

Published online by Cambridge University Press:  15 February 2011

A. Lodding  and
P. Van Iseghem
A. Lodding
Affiliation:
Chalmers University of Technology, S-41296 Gothenburg, Sweden
P. Van Iseghem
Affiliation:
Sck.Cen, Boeretang 200, B-2400 Mol, Belgium
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Abstract

In-situ corrosion tests on nuclear waste glasses in Boom clay provided direct contact glass-clay at 90°C, for periods of 2, 3.5 and 7.5 years. The corroded reference glasses (two R7T7 type glasses, four Pamela type glasses), were studied in terms of SIMS (secondary ion mass spectroscopy) and mass losses.

The Al2O3 rich Pamela glasses appear to corrode in a selective-substitutional way, the other glasses dissolve almost congruently. Differences in the corrosion extent between the glasses are associated with compositional differences and secondary phase formation. SIMS analysis provides the reaction layer thickness and the relative element behaviour in this layer. Although relatively few, the data have provided a coherent picture of glass corrosion, in terms of corrosion mechanisms, time and glass composition dependence.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 412: Symposium V – Scientific Basis for Nuclear Waste Management XIX , 1995 , 229
Copyright
Copyright © Materials Research Society 1996

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References

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