Activity plan for activity E-20-81: development and experimental validation of crevice corrosion models
- LLNL
Alloy 22 [UNS N06022] is now being considered for construction of high level waste containers to be emplaced at the potential repository at Yucca Mountain or elsewhere. In essence, this alloy is 21% Cr, 13% Mo, 4% Fe, 3% W, 2% Co, with the balance being Ni. Variants without tungsten are also being considered. Detailed mechanistic models are being developed to account for the corrosion of Alloy 22 surfaces in crevices that will inevitably form. Such occluded areas experience substantial decreases in pH, with corresponding elevations in chloride concentration. Other relevant materials will also be investigated: nickel-based alloys such as Alloys 825, 625, C-4, C-276 and 59; titanium-based alloys such as Grades 12, 7 and 16, carbon steels such as A516 Grade 55; stainless steels such as 304, 304L, 316, 316L and 316NG; various copper-based alloys; and any materials that would serve as crevice formers (rock, thermally-sprayed ceramics, etc.). Experimental work has been undertaken to validate the crevice corrosion model, including parallel studies with 304 stainless steel. The crevice corrosion model is described in detail in scientific notebooks of the Principal Investigator, as well as other publications. Codes will be prepared in accordance with the YMP QP entitled ''Software Quality Assurance'' (033-YMP-QP 12.0).
- Research Organization:
- Lawrence Livermore National Lab., CA (US)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 9781
- Report Number(s):
- UCRL-ID-132953
- Country of Publication:
- United States
- Language:
- English
Similar Records
Localized corrosion and stress corrosion cracking of candidate materials for high-level radioactive waste disposal containers in the US: A literature review
Effects of chloride, bromide, and thiosulfate ions on the critical conditions for crevice corrosion of several stainless alloys as a material for geological disposal packages for nuclear waste
Related Subjects
36 MATERIALS SCIENCE
CARBON STEELS
CONTAINERS
COPPER BASE ALLOYS
CREVICE CORROSION
MATHEMATICAL MODELS
NICKEL BASE ALLOYS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
STAINLESS STEELS
TITANIUM BASE ALLOYS
VALIDATION
YUCCA MOUNTAIN