Effect of cavitation on corrosion behavior of 20SiMn low-alloy steel in 3% sodium chloride solution

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	Effect of cavitation on corrosion behavior of 20SiMn low-alloy steel in 3% sodium chloride solution
	S. Z. Luo; Y. G. Zheng; M. C. Li; Z. M. Yao; W. Ke
	2003
发表期刊	Corrosion
ISSN	0010-9312
卷号	59 期号:7 页码:597-605
摘要	The cavitation corrosion behavior of 20SiMn low-alloy steel in both distilled water and 3% sodium chloride (NaCl) solution was investigated using a magnetostrictive-induced cavitation facility. Me micrographs of damaged surfaces were observed with a scanning electron microscope (SEM). The role of corrosion was analyzed using polarization curves, electrochemical impedance spectroscopy (EIS), linear polarization resistance, and the corrosion potential with or without cavitation. Futhermore, the effect of cavitation on corrosion behavior of 20SiMn steel was compared to that of oxygen bubbling. The results showed that a fraction (0.05) of the damage arose from electrochemical corrosion and a fraction (0.59) arose from corrosion-induced erosion. Cavitation shifted the corrosion potential in the positive direction and strongly enhanced the cathodic current density in the polarization curves. Cavitation also reduced the magnitude of impedance. The morphological examination revealed that the ferrite area and grain and ferrite-pearlite boundaries were preferential sites for cavitation attack as a result of the low hardness of ferrite. The mass loss came from the detachment of small pieces in the ferrite area in the early stage and from the removal of massive chunks by the propagation and connection of cracks in the following test period.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;luo, sz (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china
关键词	20simn Low-alloy Steel Cavitation Corrosion Electrochemical Impedance Spectroscopy Linear Polarization Resistance Polarization Sodium Chloride Duplex Stainless-steel Erosion Corrosion Iron Mechanism Seawater
URL	查看原文
WOS记录号	WOS:000184172800004
引用统计	被引频次：52[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/321006/35953
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Z. Luo,Y. G. Zheng,M. C. Li,et al. Effect of cavitation on corrosion behavior of 20SiMn low-alloy steel in 3% sodium chloride solution[J]. Corrosion,2003,59(7):597-605.
APA	S. Z. Luo,Y. G. Zheng,M. C. Li,Z. M. Yao,&W. Ke.(2003).Effect of cavitation on corrosion behavior of 20SiMn low-alloy steel in 3% sodium chloride solution.Corrosion,59(7),597-605.
MLA	S. Z. Luo,et al."Effect of cavitation on corrosion behavior of 20SiMn low-alloy steel in 3% sodium chloride solution".Corrosion 59.7(2003):597-605.