Journal
CORROSION SCIENCE
Volume 66, Issue -, Pages 142-152Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.09.012
Keywords
Stainless steel; Polarization; EIS; Passivity
Funding
- U.S. Department of Energy, Office of Nuclear Energy [116524]
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The electrochemical and corrosion behavior of a stainless-steel-based alloy made as a prototype metallic nuclear wasteform to immobilize Tc-99, has been studied in a number of reference solutions ranging in pH from 4 to 10. The results showed the 47SS(304)-9Zr-23Mo prototype alloy contained at least five distinct phases with the majority of the Re, used as a Tc surrogate, contained within a Fe2Mo intermetallic phase. Polarization studies showed this alloy exhibited generally passive behavior in a range of dilute aqueous environments. Impedance measurements indicated passivity breakdown events can occur and lead to localized corrosion, especially in slightly alkaline conditions. (c) 2012 Elsevier Ltd. All rights reserved.
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