Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-25T21:57:09.828Z Has data issue: false hasContentIssue false
  • English
  • Français

Evaluation of Corrosion Processes Affecting the Performance of Alloy 22 as a Proposed Waste Package Material

Published online by Cambridge University Press:  01 February 2011

Gustavo A. Cragnolino ,
Darrell S. Dunn  and
Yi-Ming Pan
Gustavo A. Cragnolino
Affiliation:
Center for Nuclear Waste Regulatory Analyses (CNWRA), Southwest Research Institute, San Antonio, TX 78238–5166, U.S.A.
Darrell S. Dunn
Affiliation:
Center for Nuclear Waste Regulatory Analyses (CNWRA), Southwest Research Institute, San Antonio, TX 78238–5166, U.S.A.
Yi-Ming Pan
Affiliation:
Center for Nuclear Waste Regulatory Analyses (CNWRA), Southwest Research Institute, San Antonio, TX 78238–5166, U.S.A.
Get access

Abstract

This paper presents recent work on evaluating localized corrosion and stress corrosion cracking, two corrosion processes that are important to the long-term performance of Alloy 22 (58Ni-22Cr-13Mo-3W-4Fe). This alloy is the material preferred by the U.S. Department of Energy (DOE) for the outer container of the waste package to be used in the proposed high-level radioactive waste repository at Yucca Mountain, Nevada. It was found that both welded and thermally aged materials are more susceptible to localized corrosion in chloride solutions at temperatures above 60 EC than the mill-annealed material. This observation suggests that welding and certain post-welding operations may decrease the estimated life of the waste packages. However, no stress corrosion crack growth was observed in concentrated chloride solutions and simulated, concentrated groundwater at 95 EC when precracked compact tension specimens were tested under both constant and cycling loading.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 435
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. DOE. Yucca Mountain Science and Engineering Report, Office of Civilian Radioactive Waste Management, DOE/RW-0539. 2001.Google Scholar
2. Sagüés, A., in Scientific Basis for Nuclear Waste Management XXV, edited by McGrail, B.P. and Cragnolino, G.A., (Mater. Res. Soc. Proc. 713, Warrendale, PA, 2002) pp. 17–27.Google Scholar
3. Brossia, C.S., Browning, L., Dunn, D.S., Moghissi, O.C., Pensado, O., and Yang, L.. Effect of Environment on the Corrosion of Waste Package and Drip Shield Materials. CNWRA 2001–03. San Antonio, TX: Center for Nuclear Waste Regulatory Analyses. 2001.Google Scholar
4. Cragnolino, G.A., Dunn, D.S., Pan, Y.-M., and Pensado, O., in Scientific Basis for Nuclear Waste Management XXIV, edited by Hart, K.P. and Lumpkin, G.R., (Mater. Res. Soc. Proc. 663, Warrendale, PA, 2001) pp. 507–514.Google Scholar
5. Cragnolino, G.A., Dunn, D.S., and Pan, Y.-M., in Scientific Basis for Nuclear Waste Management XXV, edited by McGrail, B.P. and Cragnolino, G.A., (Mater. Res. Soc. Proc. 713, Warrendale, PA, 2002) pp. 53–60.Google Scholar
6. Dunn, D.S, Cragnolino, G.A., and Sridhar, N., Corrosion, 56, 90–104 (2000).Google Scholar
7. Dunn, D.S., Yang, L., Pan, Y.-M., and Cragnolino, G.A.. Localized Corrosion Susceptibility of Alloy 22. CORROSION/2003. (NACE International, Houston, TX, 2003). Paper No. 03697.Google Scholar
8. Pensado, O., Dunn, D.S., and Cragnolino, G.A., in Scientific Basis for Nuclear Waste Management XXVI, edited by Finch, R.J. and Bullen, D.B.. (Mater. Res. Soc. Proc. 757. Warrendale, PA, to be published in 2003)Google Scholar
9. Dunn, D.S., Pan, Y.-M., and Cragnolino, G. A., Stress Corrosion Cracking of Nickel-Chromium-Molybdenum Alloys in Chloride Solutions, CORROSION 2002 (NACE International, Houston, TX, 2002). Paper No.02425.Google Scholar
10. Cragnolino, G.A., Dunn, D.S., and Pan, Y.-M., Effect of Potential and Environment on the Stress Corrosion Cracking Susceptibility of Ni-Cr-Mo Alloys. CORROSION/2003. (NACE International, Houston, TX, 2003) Paper No. 03541.Google Scholar
11. Pan, Y.-M., Dunn, D.S., and Cragnolino, G.A.. Phase Instability and Corrosion of Alloy 22 as a High-Level Nuclear Waste Container Material. The Mike Meshii Symposium on Electron Microscopy: Its Role in Materials Research. Weertman, J.R. et al., eds. (The Minerals, Metals and Materials Society, Warrendale, PA, 2003), pp. 201–208.Google Scholar
12. Cragnolino, G. A.. Long-term Passive Dissolution and Localized Corrosion of Alloy 22. Proceedings From an International Workshop on Long-Term Passive Behavior July 19–20, 2001 Arlington, Virginia. Sagues, A.A. and Di Bella, C.A.W., eds. (U.S. Nuclear Waste Technical Review Board, Arlington, VA: December 2001).Google Scholar