Aqueous corrosion of natural and nuclear waste glasses I. Comparative rates of hydration in liquid and vapor environments at elevated temperatures

Autor:	C.D. Byers, Teofilo A. Abrajano, John K. Bates
Rok vydání:	1986
Předmět:	Ion exchange Chemistry Aqueous corrosion Radioactive waste Condensed Matter Physics Hydrothermal circulation Electronic Optical and Magnetic Materials Surface ph High surface Hydrolysis Chemical engineering Materials Chemistry Ceramics and Composites Nuclear chemistry
Zdroj:	Journal of Non-Crystalline Solids. 84:251-257
ISSN:	0022-3093
DOI:	10.1016/0022-3093(86)90783-0
Popis:	This paper presents the results of aqueous corrosion experiments performed on natural and nuclear waste glasses in liquid and vapor environments. It is shown for all glass compositions considered that the rate of hydration in hydrothermal experiments is higher than the rate of vapor hydration at the same temperature. It is also demonstrated, in the case of the nuclear waste glass SRL 131, that the rate of hydration is a strong function of pH2O and that a critical pH2O exists below which hydration rates are negligible. Both phenomena may be explained by the higher surface pH and mobile cation concentrations that develop during glass/vapor interaction relative to glass liquid interaction. High surface pH inhibits ion exchange but enhances network hydrolysis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c64c69e0c285285b603e9d7eb531a03b https://doi.org/10.1016/0022-3093(86)90783-0 Zobrazit plný text záznamu