Active-Passive Transition of an Fe-6 mass% Cr Surface in Acidic Sodium Sulfate Solutions Under a Laminar Flow Condition Evaluated by Ellipso-Microscopy and Channel Flow Electrode Method

Fujimura, Akihiro; Kitagawa, Yuichi; Hasegawa, Yasuchika; Doi, Takashi; Fushimi, Koji

doi:10.1149/1945-7111/abfb96


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Active-Passive Transition of an Fe-6 mass% Cr Surface in Acidic Sodium Sulfate Solutions Under a Laminar Flow Condition Evaluated by Ellipso-Microscopy and Channel Flow Electrode Method

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Title:	Active-Passive Transition of an Fe-6 mass% Cr Surface in Acidic Sodium Sulfate Solutions Under a Laminar Flow Condition Evaluated by Ellipso-Microscopy and Channel Flow Electrode Method
Authors:	Fujimura, Akihiro Browse this author
	Kitagawa, Yuichi Browse this author →KAKEN DB
	Hasegawa, Yasuchika Browse this author →KAKEN DB
	Doi, Takashi Browse this author
	Fushimi, Koji Browse this author →KAKEN DB
Issue Date:	1-May-2021
Publisher:	The Electrochemical Society (ECS)
Journal Title:	Journal of the electrochemical society
Volume:	168
Issue:	5
Start Page:	51503
Publisher DOI:	10.1149/1945-7111/abfb96
Abstract:	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.
Type:	article
URI:	http://hdl.handle.net/2115/81746
Appears in Collections:	工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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