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Characterization of the Resistance of Alloy 22 to Stress Corrosion Cracking

[+] Author Affiliations
Kenneth J. King, John C. Estill, Raúl B. Rebak

Lawrence Livermore National Laboratory, Livermore, CA

Paper No. PVP2002-1620, pp. 103-109; 7 pages
  • ASME 2002 Pressure Vessels and Piping Conference
  • Transportation, Storage, and Disposal of Radioactive Materials
  • Vancouver, BC, Canada, August 5–9, 2002
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4660-1
  • Copyright © 2002 by ASME


In its current design, the high-level nuclear waste container includes an external layer of Alloy 22 (Ni-22Cr-13Mo-3W-3Fe). Since the containers may be exposed to multi-ionic aqueous environments over their lifetime, a potential degradation mode of the outer layer could be environmentally assisted cracking (EAC). The objective of the current research is to characterize the effect of applied potential and temperature on the susceptibility of Alloy 22 to EAC in simulated concentrated water (SCW) using the slow strain rate test (SSRT). Results show that Alloy 22 may suffer EAC at applied potentials approximately 400 mV more anodic than the corrosion potential (Ecorr ).

Copyright © 2002 by ASME



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