As part of proposed geological repository at Yucca Mountain, Nevada, Alloy 22 (Ni-22Cr-13Mo-3W-3Fe) has been chosen as the candidate material for a 2-cm outer layer on the high-level nuclear waste containers. During the repository period, the container materials will be subject to corrosion due to their exposure to multi-ionic aqueous environments. Although Alloy 22 has demonstrated excellent corrosion resistance, accumulation of a small, yearly corrosion rate for 10,000 or more years can be significant. When subjected to the conventional weight loss technique for corrosion studies, Alloy 22 requires many years to demonstrate a detectible weight loss. The goal of this research is to seek alternative techniques to determine a reasonably confident corrosion rate. This paper will discuss the latest experimental results using the potentiostatic technique to determine passive dissolution rates.
- Pressure Vessels and Piping Division
Passive Corrosion Behavior of Alloy 22 in Multi-Ionic Aqueous Environments
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Lian, T, Estill, JC, Hust, GA, Fix, DV, & Rebak, RB. "Passive Corrosion Behavior of Alloy 22 in Multi-Ionic Aqueous Environments." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. Transportation, Storage, and Disposal of Radioactive Materials. Vancouver, BC, Canada. August 5–9, 2002. pp. 67-74. ASME. https://doi.org/10.1115/PVP2002-1615
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