Impedance spectroscopic study of corrosion inhibition of copper by surfactants in the acidic solutions

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	Impedance spectroscopic study of corrosion inhibition of copper by surfactants in the acidic solutions
	H. Y. Ma; S. H. Chen; B. S. Yin; S. Y. Zhao; X. Q. Liu
	2003
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	45 期号:5 页码:867-882
摘要	The inhibitive action of the four surfactants, cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate, sodium oleate and polyoxyethylene sorbitan monooleate (TWEEN-80), on the corrosion behavior of copper was investigated in aerated 0.5 mol dm(-3) H2SO4 solutions, by means of electrochemical impedance spectroscopy. These surfactants acted as the mixed-type inhibitors and lowered the corrosion reactions by blocking the copper surface through electrostatic adsorption or chemisorption. The inhibitor effectiveness increased with the exposure time to aggressive solutions, reached a maximum and then decreased, which implies the orientation change of adsorbed surfactant molecules on the surface. CTAB inhibited most effectively the copper corrosion among the four surfactants. The copper surface was determined to be positively charged in sulfuric acid solutions at the corrosion potential, which is unfavourable for electrostatic adsorption of cationic surfactant, CTAB. The reason why CTAB gave the highest inhibition efficiency was attributed to the synergistic effect between bromide anions and positive quaternary ammonium ions. C16H33N(CH3)(4)(+) ions may electrostatically adsorbed on the copper surface covered with primarily adsorbed bromide ions. On the basis of the variation of impedance behaviors of copper in the surfactant-containing solutions with the immersion time, the adsorption model of the surfactants on the copper surface was proposed. (C) 2002 Elsevier Science Ltd. All rights reserved.
部门归属	shandong univ, state educ minist, key lab colloid & interface chem, jinan 250100, peoples r china. shandong univ, dept chem, jinan 250100, peoples r china. state key lab corros & protect met, shenyang 110015, peoples r china.;ma, hy (reprint author), shandong univ, state educ minist, key lab colloid & interface chem, jinan 250100, peoples r china
关键词	Cetyltrimethylammonium Bromide (Ctab) Inhibition EfficIency (Ie) Hemimicelle Potential Of Zero Charge (Pzc) Electrochemical Impedance Spectroscopy (Eis) m Sulfuric-acid 0.5m Nacl Electrode Iron Dissolution Mechanism Chloride Sulfate Alloys Media
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WOS记录号	WOS:000180841100002
引用统计	被引频次：293[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/321006/35962
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Y. Ma,S. H. Chen,B. S. Yin,et al. Impedance spectroscopic study of corrosion inhibition of copper by surfactants in the acidic solutions[J]. Corrosion Science,2003,45(5):867-882.
APA	H. Y. Ma,S. H. Chen,B. S. Yin,S. Y. Zhao,&X. Q. Liu.(2003).Impedance spectroscopic study of corrosion inhibition of copper by surfactants in the acidic solutions.Corrosion Science,45(5),867-882.
MLA	H. Y. Ma,et al."Impedance spectroscopic study of corrosion inhibition of copper by surfactants in the acidic solutions".Corrosion Science 45.5(2003):867-882.