Journal
CORROSION SCIENCE
Volume 177, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108991
Keywords
Stainless steels; Oxide film; PWR primary water; Cr content; B2-NiAl
Funding
- Energy Technology R&D Project of MOTIE/KETEP [20171510101990]
- Nuclear R&D Program of MSIT/NRF of the Republic of Korea [2019M2D2A2050927]
- National Research Foundation of Korea [2019M2D2A2050927] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Corrosion behavior in simulated pressurized water reactor (PWR) primary water was investigated for stainless steels with 16 and 22 wt% Cr having austenitic, ferritic, and duplex microstructure. For alloys with 22 wt% Cr, the Cr-rich inner oxide layer consisted of Cr2O3 and FeCr2O4 is formed. For alloys with 16 wt% Cr, the Cr-rich spinel inner oxide layer is formed. In-situ and ex-situ electrochemical impedance analyses and Mott-Schottky analysis was used to rank the corrosion resistance of the alloys. In addition to chemical composition, the phases (ferrite, austenite, and B2-NiAl) also affect the corrosion behaviors of the alloys.
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