Glass dissolution at 20, 40, 70 and 90 C: Short-term effects of solution chemistry and long-term Na release

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The corrosion behavior of a borosilicate glass containing 20 mass 5 Na{sub 2}O was assessed using static dissolution tests. This glass (LD6-5412) is representative of high Na glasses that may be used to stabilize Hanford low-level radioactive waste. The normalized mass loss (NL) decreases as NL(Na) {approximately} NL(B) > NL(Si) in 20 and 40 C for tests conducted at glass surface area to leachant volume (S/V) ratio of 10 m{sup {minus}1}, and decreases as NL(Na) > NL(B) {approximately} NL(Si) in 90 C tests conducted at 10 m{sup {minus}1} and in all tests conducted at higher S/V. The difference in the ... continued below

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9 p.

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Bakel, A.J.; Ebert, W.L.; Strachan, D.M. & Brown, N.R. August 1, 1996.

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Description

The corrosion behavior of a borosilicate glass containing 20 mass 5 Na{sub 2}O was assessed using static dissolution tests. This glass (LD6-5412) is representative of high Na glasses that may be used to stabilize Hanford low-level radioactive waste. The normalized mass loss (NL) decreases as NL(Na) {approximately} NL(B) > NL(Si) in 20 and 40 C for tests conducted at glass surface area to leachant volume (S/V) ratio of 10 m{sup {minus}1}, and decreases as NL(Na) > NL(B) {approximately} NL(Si) in 90 C tests conducted at 10 m{sup {minus}1} and in all tests conducted at higher S/V. The difference in the corrosion behavior is probably caused by the influence of dissolved glass components in the leachates. The NL(Na) is greater than the NL(B) or NL(Si) in all the tests conducted. Results from long-term tests at 2,000 m{sup {minus}1} show that the preferential release of Na persists for longer than one year at all temperatures and indicate that Na is released from this glass by an ion exchange process.

Physical Description

9 p.

Notes

INIS; OSTI as DE96012808

Source

  • 98. annual meeting of the American Ceramic Society, Indianapolis, IN (United States), 14-17 Apr 1996

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  • Other: DE96012808
  • Report No.: ANL/CMT/CP--88362
  • Report No.: CONF-9604124--13
  • Grant Number: W-31109-ENG-38;AC06-76RL01830
  • DOI: 10.2172/270682 | External Link
  • Office of Scientific & Technical Information Report Number: 270682
  • Archival Resource Key: ark:/67531/metadc665717

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 17, 2015, 1:09 p.m.

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Bakel, A.J.; Ebert, W.L.; Strachan, D.M. & Brown, N.R. Glass dissolution at 20, 40, 70 and 90 C: Short-term effects of solution chemistry and long-term Na release, report, August 1, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc665717/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.