期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 5, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abfb96
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- Innovative Structural Materials R&D Project of New Energy and industrial technology Development Organization (NEDO), Japan
Electrochemical ellipso-microscopy combined with the channel flow triple electrode method was used to evaluate the active-passive transition behavior of Fe-6% Cr in acidic sodium sulfate solutions. The study found that forced convection of the electrolyte solution affected the mass-transport process of Cr(III) species on the SE surface in the latter half of the active region.
Electrochemical ellipso-microscopy was combined with the channel flow triple electrode method to evaluate the active-passive transition behavior of Fe-6 mass% Cr in acidic sodium sulfate solutions under the control of mass-transport reaction. During potentiodynamic polarization of the Fe-6 mass% Cr specimen electrode (SE), the SE surface was monitored by ellipso-microscopy and generated Fe(II) and Cr(III) species from the SE were detected at two detector electrodes arranged downstream in parallel. Forced convection of the electrolyte solution affected the mass-transport process of Cr(III) species on the SE surface in the latter half of the active region. In addition, the electrolyte solution flow resulted in enhancement of the passivation process and Cr enrichment on the passive surface. The effects of the electrolyte solution flow on active-passive transition and improvement of the passive film resistance are discussed.
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