Effect of alteration phase formation on the glass dissolution rate
Conference
·
OSTI ID:561158
The dissolution rates of many glasses have been observed to increase upon the formation of certain alteration phases. It is important to understand the mechanism by which alteration phases affect glass corrosion behavior and the glass dissolution rate to reliably predict whether or not similar effects will occur in a disposal environment and the impact of phase formation on the long-term performance of waste glass. While solid state transformation of a glass to thermodynamically more stable phases in kinetically prohibitive, contact by water provides an energetically favorable pathway for this transformation to occur by a dissolution-reprecipitation mechanism. The kinetics of the transformation depends on the dissolution kinetics of the glass and the precipitation kinetics of the alteration phases. The rates of these two processes are linked primarily through the solution activity of orthosilicic acid (and perhaps also that of an aluminum-bearing species).
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 561158
- Report Number(s):
- ANL/CMT/CP--94430; CONF-9708128--; ON: DE97054270
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of alteration product precipitation on glass dissolution
Measurement of the glass dissolution rate in the presence of alteration phases
Dissolution rates of DWPF glasses from long-term PCT
Journal Article
·
Sun Jun 01 00:00:00 EDT 2014
· Applied Geochemistry
·
OSTI ID:1132223
Measurement of the glass dissolution rate in the presence of alteration phases
Conference
·
Mon Jul 01 00:00:00 EDT 1996
·
OSTI ID:274137
Dissolution rates of DWPF glasses from long-term PCT
Conference
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:460780