An impedance investigation of corrosion protection of copper by self-assembled monolayers of alkanethiols in aqueous solution

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	An impedance investigation of corrosion protection of copper by self-assembled monolayers of alkanethiols in aqueous solution
	G. Y. Li; H. Y. Ma; Y. L. Jiao; S. H. Chen
	2004
发表期刊	Journal of the Serbian Chemical Society
ISSN	0352-5139
卷号	69 期号:10 页码:791-805
摘要	Self-assembled monolayers (SAMs) of three n-alkanethiols, 1-octadecanethiol (C18SH), 1-dodecanethiol (C12SH), and 1-hexanethiol (C6SH), were formed on fresh, oxide-free copper surfaces obtained by HNO3 etching. The corrosion protection abilities of the three alkanethiol SAMs were evaluated in 0.2 mol cm(-3) NaCl, 0.2 mol cm(-3) HCI and 0.2 mol dm(-3) H2SO4 solutions using the electrochemical impedance spectroscopy (EIS) method. The SAMs act as a hydrophobic barrier layer, which effectively prevents the copper substrate from contacting corrosive ions, thereby inhibiting corrosion of the copper to a considerable degree. A general equivalent circuit for the SAM-covered electrodes was proposed, by means of which the impedance behavior of the electrodes was interpreted and the corresponding electrochemical parameters were acquired. In addition, the quality of the SAMs and development of defects in the SAMs were also been evaluated based on the equivalent circuit. The dependence of the capacitance of the SAMs on the applied potentials was used to determine the stability of the SAMs at the applied potentials.
部门归属	shandong univ, dept chem, jinan 250100, peoples r china. state key lab corros & protect met, shenyang 110015, peoples r china.;chen, sh (reprint author), shandong univ, dept chem, jinan 250100, peoples r china;shchen@sdu.edu.cn
关键词	Electrochemical Impedance Spectroscopy (Eis) Self-assembled Monolayers (Sams) Alkanethiol Corrosion Protection Equivalent Circuit Scanning-tunneling-microscopy Hydrochloric-acid Solution N-alkanethiols Chain-length Gold Spectroscopy Films Electrodes Chloride Defects
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WOS记录号	WOS:000224923100008
引用统计	被引频次：49[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/321006/35405
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Y. Li,H. Y. Ma,Y. L. Jiao,et al. An impedance investigation of corrosion protection of copper by self-assembled monolayers of alkanethiols in aqueous solution[J]. Journal of the Serbian Chemical Society,2004,69(10):791-805.
APA	G. Y. Li,H. Y. Ma,Y. L. Jiao,&S. H. Chen.(2004).An impedance investigation of corrosion protection of copper by self-assembled monolayers of alkanethiols in aqueous solution.Journal of the Serbian Chemical Society,69(10),791-805.
MLA	G. Y. Li,et al."An impedance investigation of corrosion protection of copper by self-assembled monolayers of alkanethiols in aqueous solution".Journal of the Serbian Chemical Society 69.10(2004):791-805.