EIS research on flow-induced corrosion of metal in flowing chloride media

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	EIS research on flow-induced corrosion of metal in flowing chloride media
	Yong, XY ; Liu, JJ ; Lin, YZ
通讯作者	Yong, XY(xingyy@tjchemtech.com)
	2005-08-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	41 期号:8 页码:871-875
摘要	The electrochemical impedance spectroscopies (ETS) of electrodes made of carbon steel and duplex stainless steel were obviously different in single-phase or two-phase chloride media with different flow volocities. With increasing flow velocity the shear stress on the metal electrode surface and the electrochemical corrosion rate increased, and the electrochemical reaction impedance decreased. Finally the flow-induced corrosion rate of metal electrode was increased by the synergism effect. Compared with ETS of carbon steel electrode, it was at higher flowing velocity that the feature of Nyquist plot in low frequency region of duplex stainless steel electrode was changed. All above these proved that Cao's EIS theory for irreversible electrode can be used for studying electrode process under flow-induced corrosion. The experimental results showed that it was in low frequency region that the EIS feature of electrode in flowing media was changed when the shear stress on the electrode surface was high enough and that the inductive impedance feature of Nyquist plot in low frequency region meant that the normally dissolving mechanism and rate of metal electrode surface were changed by strong hydrodynamics. At the same time, the local corrosion, pits and holes, occurred on the electrode surface. Under this condition, the EIS of passive electrode further showed that the metal electrode surface was subject to scraping and stroke of solid particles in flowing solid / liquid two-phase media.
关键词	carbon steel duplex stainless steel flowing chloride medium flow-induced corrosion electrochemical impedance spectroscopy (EIS)
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000231652000017
出版者	SCIENCE PRESS
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/84276
专题	中国科学院金属研究所
通讯作者	Yong, XY
作者单位	1.Beijing Tianjiu Chem Technol Co Ltd, Beijing 100044, Peoples R China 2.Beijing Univ Chem Technol, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yong, XY,Liu, JJ,Lin, YZ. EIS research on flow-induced corrosion of metal in flowing chloride media[J]. ACTA METALLURGICA SINICA,2005,41(8):871-875.
APA	Yong, XY,Liu, JJ,&Lin, YZ.(2005).EIS research on flow-induced corrosion of metal in flowing chloride media.ACTA METALLURGICA SINICA,41(8),871-875.
MLA	Yong, XY,et al."EIS research on flow-induced corrosion of metal in flowing chloride media".ACTA METALLURGICA SINICA 41.8(2005):871-875.