A C-Mn steel, ASTM A516 Grade 55, is the primary candidate material for the outer metallic barrier in the current advanced conceptual design for the waste package in the proposed high-level radioactive waste repository at Yucca Mountain. The expected performance of this steel and that of the alternate material, A387 Grade 22 (2¼Cr-lMo) steel, as affected by thermal embrittlement, dry or humid air oxidation, uniform and localized aqueous corrosion, microbially influenced corrosion, and stress corrosion cracking, is discussed on the basis of experimental studies and a review of information and data available in the literature.

Subject
Embrittlement, Water, Materials, Diffusion, Containment, Film formation, Steel, Oxygen, Carbon steel, Carbonate stress corrosion cracking, Stress corrosion cracking, Oxidation, Low alloy steel
Keywords:
carbon steel, low-alloy steel, thermal embrittlement, air oxidation, humid air corrosion, pitting corrosion, microbially influenced corrosion, stress corrosion cracking, containers, nuclear waste
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1998
GOV
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