Corrosion of waste glasses in Boom clay: Studies of element concentrations by SIMS

Book · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:264425

Lodding, A ^[1]; Van Iseghem, P ^[2]

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1. Chalmers Univ. of Technology, Gothenburg (Sweden)
2. SCK-CEN, Mol (Belgium)

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 Al{sub 2}O{sub 3} 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 behavior 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.

• OSTI ID: 264425
• Report Number(s): CONF-951155--; ISBN 1-55899-315-0
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CHEMICAL COMPOSITION
CLAYS
CORROSION
CORROSION RESISTANCE
CORROSIVE EFFECTS
EXPERIMENTAL DATA
GLASS
ION MICROPROBE ANALYSIS
LEACHING
MASS SPECTROSCOPY
PHASE TRANSFORMATIONS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
UNDERGROUND DISPOSAL
VITRIFICATION
WASTE FORMS