Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO(2)-saturated solutions and its synergism with thiourea

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	Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO(2)-saturated solutions and its synergism with thiourea
	P. C. Okafor; C. B. Liu; X. Liu; Y. G. Zheng; F. Wang; C. Y. Liu
	2010
发表期刊	Journal of Solid State Electrochemistry
ISSN	1432-8488
卷号	14 期号:8 页码:1367-1376
摘要	The inhibition and adsorption behavior of 2-undecyl-1-sodium ethanoate-imidazoline salt (2M2) and thiourea (TU) on N80 mild steel in CO(2)-saturated 3 wt.% NaCl solutions was studied at 25 A degrees C, pH 4, and 1 bar CO(2) partial pressure using electrochemical methods. It was found that inhibition efficiency (eta%) increased with increase in 2M2 concentration but decreased with increase in TU concentration with optimum eta% value at 20 mg l(-1) TU. The data suggest that the compounds functioned via a mixed-inhibitor mechanism. The inhibition process is attributed to the formation of an adsorbed film of 2M2 and TU via the inhibitors polycentric adsorption sites on the metal surface which protects the metal against corrosion. A synergistic effect was observed between TU and 2M2. Potential of unpolarizability, E (u), was observed in the presence of 100 mg l(-1) TU which was shifted positively in the presence of 2M2-100 mg l(-1) TU blends, which suggests that the presence of 2M2 stabilized the adsorption of TU molecules on the surface of the metal. The adsorption characteristics of 2M2 were approximated by Langmuir adsorption isotherm.
部门归属	[okafor, p. c.; liu, c. b.; liu, x.; zheng, y. g.] cas, state key lab corros & protect, inst met res, shenyang 110016, liaoning prov, peoples r china. [okafor, p. c.] univ calabar, dept pure & appl chem, calabar 1115, nigeria. [wang, f.; liu, c. y.; wang, f.] jilin oilfield corp petrochina, songyuan 138000, jilin province, peoples r china.;zheng, yg (reprint author), cas, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, liaoning prov, peoples r china;pcokafor@gmail.com ygzheng@imr.ac.cn
关键词	Adsorption Co(2) Corrosion Imidazoline Mild Steel Synergism Thiourea Impedance Spectroscopy Eis Sulfuric-acid-solution m Hcl Solutions Mild-steel Dioxide Corrosion Benzimidazole Derivatives Anodic-dissolution Chloride Solutions H2so4 Solutions Iodide-ions
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31396
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. C. Okafor,C. B. Liu,X. Liu,et al. Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO(2)-saturated solutions and its synergism with thiourea[J]. Journal of Solid State Electrochemistry,2010,14(8):1367-1376.
APA	P. C. Okafor,C. B. Liu,X. Liu,Y. G. Zheng,F. Wang,&C. Y. Liu.(2010).Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO(2)-saturated solutions and its synergism with thiourea.Journal of Solid State Electrochemistry,14(8),1367-1376.
MLA	P. C. Okafor,et al."Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO(2)-saturated solutions and its synergism with thiourea".Journal of Solid State Electrochemistry 14.8(2010):1367-1376.