Abstract
The corrosion behavior of model Zr-based alloys at 500 °C is assessed by long term (up to 400 days) corrosion testing in an effort to evaluate their potential for use in the supercritical water reactor and to assess the influence of alloying elements on corrosion behavior. The corrosion weight gains from such systematic testing are seen to be a factor of five higher than those measured at 360 °C but the protectiveness ranking of the alloys is similar. Detailed characterization of the oxide layers to rationalize the differences in corrosion behavior was performed using synchrotron radiation and systematic differences are observed in protective and non-protective oxides, especially near the oxide-metal interface. The overall corrosion rate of the best Zr-based alloys compared favorably with those of other alloys being considered for use in the supercritical water reactor.
Original language | English |
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Pages (from-to) | 61-75 |
Number of pages | 15 |
Journal | Journal of Nuclear Materials |
Volume | 371 |
Issue number | 1-3 |
DOIs | |
State | Published - Sep 15 2007 |
Externally published | Yes |
Funding
The authors would like to thank Z. Cai, Y. Chu, J. Ilavsky and B. Lai at Argonne National Laboratory for their assistance with the experiments at APS. This research was supported by a DOE I-NERI grant no. DE-FG07-03RL14530 and by MOST at KAERI. Use of the Advanced Photon Source was supported by the US Department of Energy, Basic Energy Sciences, Office of Science, under Contract No. W-31-109-Eng-38. M.J. Gomes da Silva was a recipient of a scholarship from CNPq-Brazil for his doctoral study, while working on this project.
Funders | Funder number |
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US Department of Energy | |
U.S. Department of Energy | DE-FG07-03RL14530 |
Office of Science | |
Basic Energy Sciences | |
Ministry of Science and Technology |