Evaluation of Metal Corrosion under Defective Coatings by WBE and EIS Technique

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	Evaluation of Metal Corrosion under Defective Coatings by WBE and EIS Technique
	W. Zhang; J. Wang; Y. N. Li; W. Wang
	2010
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	26 期号:11 页码:2941-2950
摘要	We investigated the corrosion of steel under defective coatings in 3.5% (mass fraction) NaCl solution by the wire beam electrode (WBE) and electrochemical impedance spectroscopy (EIS) technique. During the entire coating deterioration process, the EIS diagrams were dominated by the substrate corrosion process of the defect while the coatings and underlying electrochemical processes were "averaged" out. However, according to the current distribution maps plotted using the WBE, EIS responses of the anodic and cathodic regions of the defect and underlying coatings were detected. Initially, the high anodic and cathodic current densities were only monitored at the defect areas and then the cathodic sites spread out beneath the coatings around t2948he defect while the anodic sites remained on the defect. The substrate corrosion initiation and development mechanism of the defect and underlying coatings is discussed based on experimental results.
部门归属	[zhang wei; wang jia; li yu-nan; wang wei] ocean univ china, coll chem & chem engn, qingdao 266100, shandong, peoples r china. [zhang wei] cent res inst steel & iron, qingdao marine corros inst, qingdao 266071, shandong, peoples r china. [wang jia] state key lab corros & protect met, shenyang 110016, peoples r china.;wang, j (reprint author), ocean univ china, coll chem & chem engn, qingdao 266100, shandong, peoples r china;jwang@mail.ouc.edu.cn
关键词	Electrochemical Impedance Spectroscopy Wire Beam Electrode Organic Coating Wire Beam Electrode Electrochemical Impedance Spectroscopy Scanning Kelvin Probe Organic Coatings Cathodic Protection Steel Inhomogeneity Degradation Tool
URL	查看原文
WOS记录号	WOS:000283648000011
引用统计	被引频次：20[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/321006/31724
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Zhang,J. Wang,Y. N. Li,et al. Evaluation of Metal Corrosion under Defective Coatings by WBE and EIS Technique[J]. Acta Physico-Chimica Sinica,2010,26(11):2941-2950.
APA	W. Zhang,J. Wang,Y. N. Li,&W. Wang.(2010).Evaluation of Metal Corrosion under Defective Coatings by WBE and EIS Technique.Acta Physico-Chimica Sinica,26(11),2941-2950.
MLA	W. Zhang,et al."Evaluation of Metal Corrosion under Defective Coatings by WBE and EIS Technique".Acta Physico-Chimica Sinica 26.11(2010):2941-2950.