Electrochemical Corrosion Behaviors of Rusted Carbon Steel

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	Electrochemical Corrosion Behaviors of Rusted Carbon Steel
	Y. Zou; J. Wang; Y. Y. Zheng
	2010
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	26 期号:9 页码:2361-2368
摘要	Electrochemical methods including polarization curves, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) were used to characterize and investigate the electrochemical behavior of rusted carbon steel immersed in seawater. Results indicate that the inner rust layer that forms on the surface of the carbon steel after long. term immersion greatly affects the electrode process. Polarization resistance (R(p)), determined by LPR and EIS, increases during the initial immersion period. After long. term immersion, it decreases. R(p) initially increases and then decreases gradually with immersion time. The electrochemical characteristics of the rusted carbon steel were studied by removing the outer and inner rust layers. The materials were analyzed by Fourier transform infrared (FTIR) spectroscopy and their cross. sectional morphologies were obtained to determine the cause. The results show that the beta-FeOOH, which exists in the inner rust layer, has high electrochemical activity. Its content increases with the growth of the inner rust layer. In the electrochemical tests, even a small amount of polarization allows beta-FeOOH to participate in the cathodic reduction reaction. Besides the anodic dissolution of iron and the cathodic reduction of oxygen, rust reduction is also possible. For this reason, the cathodic reaction rate is promoted and R(p) decreases.
部门归属	[zou yan; wang jia; zheng ying-ying] ocean univ china, coll chem & chem engn, qingdao 266100, shandong, peoples r china. [wang jia] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;wang, j (reprint author), ocean univ china, coll chem & chem engn, qingdao 266100, shandong, peoples r china;jwang@ouc.edu.cn
关键词	Electrochemical Behavior Rust Layer Polarization Resistance Cathodic Reduction Fourier Transform Infrared Spectroscopy Atmospheric Corrosion Layers Reduction Iron Wet
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WOS记录号	WOS:000281538100007
引用统计	被引频次：12[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/321006/31808
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Zou,J. Wang,Y. Y. Zheng. Electrochemical Corrosion Behaviors of Rusted Carbon Steel[J]. Acta Physico-Chimica Sinica,2010,26(9):2361-2368.
APA	Y. Zou,J. Wang,&Y. Y. Zheng.(2010).Electrochemical Corrosion Behaviors of Rusted Carbon Steel.Acta Physico-Chimica Sinica,26(9),2361-2368.
MLA	Y. Zou,et al."Electrochemical Corrosion Behaviors of Rusted Carbon Steel".Acta Physico-Chimica Sinica 26.9(2010):2361-2368.