Erosion corrosion of duplex stainless steel in flowing neutral chloride containing sand

IMR OpenIR

	Erosion corrosion of duplex stainless steel in flowing neutral chloride containing sand
	Yong, XY ; Lin, YZ ; Liu, JJ ; Liu, SJ
通讯作者	Yong, XY()
	2001-07-18
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	37 期号:7 页码:745-748
摘要	The erosion corrosion behavior of duplex stainless steel in flowing 3.5% NaCl solution containing sand was studied. The electrochemical impedance spectroscopy (EIS) of electrode in flowing media has been measured and analyzed to clearly understand the electrochemical mechanism in erosion corrosion of duplex stainless steel. The results show that there is a critical flow velocity above which the erosion corrosion rate increases markedly. Electrochemical factors play a dominant role in the erosion corrosion of duplex stainless steel, while the hydrodynamic factor only accelerates the electrochemical process. The EIS of duplex stainless steel takes the shape of capacitive loop in high frequency region and a straight line in low frequency region when the flow velocity is below the critical value. Once flow velocity is above the critical value, the EIS of duplex stainless steel appears as a single capacitive loop with contraction of Nyquist plot in low frequency region, the diameter of which is much small. Thus, the erosion corrosion of duplex stainless steel is wholly controlled by anodic passivation and that the diffusion of ions in passivation film is a speed-controlled step when the flow velocity is below the critical value. Serious localized corrosion occurs on the surface of duplex stainless steel when the flow velocity is above the critical value. Cao's EIS theory can be equally and accurately used to analyze the EIS of electrode in flowing media.
关键词	duplex stainless steel chloride solution containing sand critical flow velocity erosion corrosion corrosion electrochemical hydrodynamics
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:000172767000014
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：3[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/321006/113021
专题	中国科学院金属研究所
通讯作者	Yong, XY
作者单位	1.Beijing Univ Chem Technol, Inst Mat Sci & Engn, Beijing 100029, Peoples R China 2.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,Lin, YZ,Liu, JJ,et al. Erosion corrosion of duplex stainless steel in flowing neutral chloride containing sand[J]. ACTA METALLURGICA SINICA,2001,37(7):745-748.
APA	Yong, XY,Lin, YZ,Liu, JJ,&Liu, SJ.(2001).Erosion corrosion of duplex stainless steel in flowing neutral chloride containing sand.ACTA METALLURGICA SINICA,37(7),745-748.
MLA	Yong, XY,et al."Erosion corrosion of duplex stainless steel in flowing neutral chloride containing sand".ACTA METALLURGICA SINICA 37.7(2001):745-748.