skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nanoscale stress-corrosion of silicate glass in aqueous solutions: Simulations and experiments.

Abstract

Abstract not provided.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories, Livermore, CA
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1367299
Report Number(s):
SAND2017-5356C
653468
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 12th Pacific Rim Conference on Ceramic and Glass Technology held May 22-25, 2017 in Waikoloa, Hawaii.
Country of Publication:
United States
Language:
English

Citation Formats

Criscenti, Louise, Rimsza, Jessica, Jones, Reese E., and Matteo, Edward N. Nanoscale stress-corrosion of silicate glass in aqueous solutions: Simulations and experiments.. United States: N. p., 2017. Web.
Criscenti, Louise, Rimsza, Jessica, Jones, Reese E., & Matteo, Edward N. Nanoscale stress-corrosion of silicate glass in aqueous solutions: Simulations and experiments.. United States.
Criscenti, Louise, Rimsza, Jessica, Jones, Reese E., and Matteo, Edward N. Mon . "Nanoscale stress-corrosion of silicate glass in aqueous solutions: Simulations and experiments.". United States. doi:. https://www.osti.gov/servlets/purl/1367299.
@article{osti_1367299,
title = {Nanoscale stress-corrosion of silicate glass in aqueous solutions: Simulations and experiments.},
author = {Criscenti, Louise and Rimsza, Jessica and Jones, Reese E. and Matteo, Edward N},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • Slow crack growth data, solution analysis and surface stress measurements are used to develop a model to explain the low crack velocity behavior of multicomponent silicate glasses. We show that the low crack velocity plateau previously observed for binary alkali silicate glasses also occurs in sodium borosilicate glasses. Our model for this behavior involves the generation of surface stress on the crack walls behind the crack tip and the effect of the stress to increase the crack tip stress intensity. We find that glasses that show preferential removal of alkali from the surface layer during aqueous corrosion can develop surfacemore » tensile stress. Surface stresses on the order of 30 MPa were measured in acidic conditions. Using a simple fracture mechanics formulation, we were able to use our data for leached layer formation rate and development of surface tensile stress to quantitatively predict the onset of a low velocity plateau in sodium borosilicate glasses. 12 refs., 10 figs.« less
  • Borosilicate glasses loaded with {approx}10 wt % plutonium were found to produce plutonium-silicate alteration phases upon aqueous corrosion under a range of conditions. The phases observed were generally rich in lanthanide (Ln) elements and were related to the lanthanide orthosilicate phases of the monoclinic Ln{sub 2}SiO{sub 5} type. The composition of the phases was variable regarding [Ln]/[Pu] ratio, depending upon type of corrosion test and on the location within the alteration layer. The formation of these phases likely has implications for the incorporation of plutonium into silicate alteration phases during corrosion of titanate ceramics, high-level waste glasses, and spent nuclearmore » fuel.« less
  • Leaching studies of SRL-131 simulated defense nuclear waste glass have been carried out to two years duration, in leachants that simulate groundwaters of different ionic strengths. The leachability of SRL-131 glass followed the trend: deionized water > silicate water > salt brine = simulated groundwater at 40/sup 0/C and deionized water = simulated groundwater > silicate water > salt brine at 90/sup 0/C. The results are in general agreement with calculations using the PHREEQE geochemical code and indicate a sometimes complex sequence temperature dependent of mineral precipitation and redissolution. The calculations done in this study have illustrated the complexity ofmore » the precipitation sequence of mineral phases as a function of reaction progress. Complex, temperature dependent, precipitation/dissolution sequences have also been observed in experiments using natural materials, such as sea water and basaltic glass. The results of this two-year study point to the need for further work in establishing the thermodynamics of the observed phases and the relationship of these phases to the thermodynamically favored suite of phases for any given waste form/host rock/groundwater system. In order to study these phases, very long-term experiments may be necessary so that the phases grow to sizes which can be studied. In addition, geochemical codes should be used to better understand the experiments, to design leach test matrices, and to help predict the long-term results of experiments. The combination of long-term experiments and geochemical codes should lead to an improved method for forecasting the long-term behavior of a nuclear waste repository. 15 refs., 3 figs., 4 tabs.« less
  • Battelle Columbus Laboratories study of stress-corrosion cracking (SCC) of line-pipe steel in aqueous solutions of CO and CO/sub 2/ revealed that pipeline steels are susceptible to SCC at partial pressures of CO/sub 2/ and CO as low as 1 psi (6.9 kPa). For SCC to occur, carbon dioxide, carbon monoxide, and water must be simultaneously present. The SCC morphology involves multiple, transgranular cracks perpendicular to the direction of maximum tensile stresses in the steel. The surest method for control of CO-CO/sub 2/ SCC is to prevent condensation by controlling the gas composition and keeping the temperature above the dewpoint. Adequatemore » dehydration of the gas prior to injection in the pipeline will prevent SCC, even for gas compositions that would promote severe SCC in the presence of water. The removal of CO/sub 2/ and CO does not appear to be practical because of the low levels of these gases that will still support SCC. In current industry practice, carbon dioxide levels are controlled to 10 psi (69 kPa) or less for control of general corrosion and pitting; however, no limits on CO have been established. In the presence of water, small amounts of CO can promote SCC at CO/sub 2/ concentrations that are acceptable for general-corrosion considerations. Oxygen in the gas greatly increases the severity of SCC and should be avoided.« less
  • Intergranular stress corrosion cracking (IGSCC) of sensitized Type 304 stainless steel was studied in aerated pure water and in chloride solutions with and without sulfide and thiosulfate anions at temperatures ranging from 50/sup 0/ to 200/sup 0/C, using the slow strain rate technique. At 50/sup 0/ to 100/sup 0/C, the presence of sulfide or thiosulfate ions in chloride solution was found to accelerate IGSCC. At 150/sup 0/C, sulfide ions inhibited SCC, while thiosulfate ions promoted SCC. At 200/sup 0/C, both these ions inhibited SCC. The influence of pH, potential, temperature and film composition on IGSCC is discussed.