Cavitation erosion behaviour of 20SiMn low alloy steel in Na2SO4 and NaHCO3 solutions

doi:10.1016/j.corsci.2005.09.004

IMR OpenIR

	Cavitation erosion behaviour of 20SiMn low alloy steel in Na2SO4 and NaHCO3 solutions
	Jiang, Sheng Li; Zheng, Yu Gui; Yao, Zhi Ming
通讯作者	Zheng, Yu Gui(ygzheng@imr.ac.cn)
	2006-09-01
发表期刊	CORROSION SCIENCE
ISSN	0010-938X
卷号	48 期号:9 页码:2614-2632
摘要	Most of the former studies on cavitation erosion (CE) in corrosive media were carried out in NaCl solutions. In contrast, the effects of SO42- and HCO3- ions, which are dominant anions in most rivers of China, on cavitation erosion have not been investigated systematically. In this paper, the cavitation erosion behaviour of 20SiMn low alloy steel in Na2SO4 and NaHCO3 solutions was investigated by using a magnetostrictive-induced CE facility. The micrographs of damaged surfaces were observed by scanning electron microscope (SEM). It was found that the CE rate of 20SiMn low alloy steel in 0.003% Na2SO4 solution was higher than that in 0.003% NaCl solution, but in 0.03%, 0.3%, and 3% solutions their CE rate was almost the same. The CE rate of 20SiMn low alloy steel in 0.0033% NaHCO3 solutions was higher than that in the equivalent 0.003-3% Na2SO4 and 0.003-3% NaCl solutions, which may be related to stress corrosion cracking or corrosion fatigue mechanism in NaHCO3 solutions. The role of corrosion was analyzed by using polarization curves, electrochemical impedance spectroscopy (EIS), linear polarization resistance and the corrosion potential with or without cavitation. Independent of the test media, cavitation shifted the corrosion potential in the positive direction and strongly enhanced the cathodic current density in the polarization curves. In the interaction of cavitation erosion and corrosion, the corrosion-induced erosion component was predominant. Cavitation also greatly reduced the magnitude of impedance though the initial impedance under cavitation conditions in 3% NaHCO3 solution was almost one order larger than that in 3% Na2SO4 solution. (c) 2005 Elsevier Ltd. All rights reserved.
关键词	cavitation erosion 20SiMn low alloy steel corrosion microstructure electrochemical tests SO42- ion HCO3- ion synergistic effects
DOI	10.1016/j.corsci.2005.09.004
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000240767300017
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：27[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/321006/88856
专题	中国科学院金属研究所
通讯作者	Zheng, Yu Gui
作者单位	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	Jiang, Sheng Li,Zheng, Yu Gui,Yao, Zhi Ming. Cavitation erosion behaviour of 20SiMn low alloy steel in Na2SO4 and NaHCO3 solutions[J]. CORROSION SCIENCE,2006,48(9):2614-2632.
APA	Jiang, Sheng Li,Zheng, Yu Gui,&Yao, Zhi Ming.(2006).Cavitation erosion behaviour of 20SiMn low alloy steel in Na2SO4 and NaHCO3 solutions.CORROSION SCIENCE,48(9),2614-2632.
MLA	Jiang, Sheng Li,et al."Cavitation erosion behaviour of 20SiMn low alloy steel in Na2SO4 and NaHCO3 solutions".CORROSION SCIENCE 48.9(2006):2614-2632.