Durability of simulated waste glass: effects of pressure and formation of surface layers

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6411033

Wicks, G G; Mosley, W C; Whitkop, P G; Saturday, K A

The leaching behavior of simulated Savannah River Plant (SRP) waste glass was studied at elevated pressures and anticipated storage temperatures. An integrated approach, which combined leachate solution analyses with both bulk and surface studies, was used to study the corrosion process. Compositions of leachates were evaluated by colorimetry and atomic absorption. Used in the bulk and surface analyses were optical microscopy, scanning electron microscopy, x-ray energy spectroscopy, wide-angle x-ray, diffraction, electron microprobe analysis, infrared reflectance spectroscopy, electron spectroscopy for chemical analysis, and Auger electron spectroscopy. Results from this study show that there is no significant adverse effect of pressure, up to 1500 psi and 90/sup 0/C, on the chemical durability of simulated SPR waste glass leached for one month in deionized water. In addition, the leached glass surface layer was characterized by an adsorbed film rich in minor constituents from the glass. This film remained on the glass surface even after leaching in relatively alkaline solutions at elevated pressures at 90/sup 0/C for one month. The sample surface area to volume of leachant ratios (SA/V) was 10:1 cm/sup -1/ and 1:10 cm/sup -1/. The corrosion mechanisms and surface and subsurface layers produced will be discussed along with the potential importance of these results to repository storage.

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6411033
• Report Number(s): DP-MS-81-25; CONF-810736-1; ON: DE81027497
• Country of Publication: United States
• Language: English

Related Subjects

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36 MATERIALS SCIENCE
360604 -- Materials-- Corrosion
Erosion
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ABSORPTION SPECTROSCOPY
AUGER ELECTRON SPECTROSCOPY
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CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COHERENT SCATTERING
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DISPERSIONS
DISSOLUTION
ELECTRON MICROPROBE ANALYSIS
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
EXPERIMENTAL DATA
GLASS
HIGH PRESSURE
HIGH-LEVEL RADIOACTIVE WASTES
INFORMATION
INFRARED SPECTRA
LEACHATES
LEACHING
MANAGEMENT
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MEDIUM PRESSURE
MEDIUM TEMPERATURE
MICROANALYSIS
MICROSCOPY
MIXTURES
NUMERICAL DATA
OPTICAL MICROSCOPY
PRESSURE DEPENDENCE
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
SCANNING ELECTRON MICROSCOPY
SCATTERING
SEPARATION PROCESSES
SOLID WASTES
SOLUTIONS
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SURFACES
VERY HIGH PRESSURE
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY