Synergistic and Antagonistic Effects of Anions and Ipomoea invulcrata as Green Corrosion Inhibitor for Aluminium Dissolution in Acidic Medium

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	Synergistic and Antagonistic Effects of Anions and Ipomoea invulcrata as Green Corrosion Inhibitor for Aluminium Dissolution in Acidic Medium
	I. B. Obot; N. O. Obi-Egbedi; S. A. Umoren; E. E. Ebenso
	2010
发表期刊	International Journal of Electrochemical Science
ISSN	1452-3981
卷号	5 期号:7 页码:994-1007
摘要	The extract of Ipomoea invulcrata (IP) has been studied as a possible source of green inhibitor for corrosion of aluminium in 1 M HCl at 30-60 degrees C using the conventional weight loss technique. The studies reveal that at constant acid concentration, the plant extract acts as an effective inhibitor for aluminium corrosion in acidic medium. Inhibition efficiency increases with concentration but decreases with increase in temperature and immersion time. The enhancement of inhibition efficiency of IP with the addition of KI and KSCN has also been studied. The apparent activation energy and the thermodynamic parameters governing the corrosion process have also been calculated. The adsorption of IP was in accord with the Langmuir adsorption isotherm at all the temperature studied. The mechanism of physical adsorption is proposed for the inhibitory action of IP and is satisfactorily explained by both kinetic and thermodynamic parameters.
部门归属	[obot, i. b.; umoren, s. a.] univ uyo, dept chem, fac sci, uyo, nigeria. [obi-egbedi, n. o.] univ ibadan, dept chem, ibadan, nigeria. [umoren, s. a.] chinese acad sci, inst met res, state key lab corros & protect, shenyang, peoples r china. [ebenso, e. e.] north west univ, dept chem, za-2735 mmabatho, south africa.;obot, ib (reprint author), univ uyo, dept chem, fac sci, uyo, nigeria;proffoime@yahoo.com
关键词	Ipomoea Involcrata Aluminium Corrosion Inhibition Adsorption Isotherm Thermodynamics Mild-steel Corrosion 0.1 m Hcl Hydrochloric-acid Exudate Gum Adsorption Characteristics Raphia-hookeri Sulfuric-acid Plant-extracts Halide-ions Derivatives
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WOS记录号	WOS:000280500500007
引用统计	被引频次：97[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/321006/31393
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	I. B. Obot,N. O. Obi-Egbedi,S. A. Umoren,et al. Synergistic and Antagonistic Effects of Anions and Ipomoea invulcrata as Green Corrosion Inhibitor for Aluminium Dissolution in Acidic Medium[J]. International Journal of Electrochemical Science,2010,5(7):994-1007.
APA	I. B. Obot,N. O. Obi-Egbedi,S. A. Umoren,&E. E. Ebenso.(2010).Synergistic and Antagonistic Effects of Anions and Ipomoea invulcrata as Green Corrosion Inhibitor for Aluminium Dissolution in Acidic Medium.International Journal of Electrochemical Science,5(7),994-1007.
MLA	I. B. Obot,et al."Synergistic and Antagonistic Effects of Anions and Ipomoea invulcrata as Green Corrosion Inhibitor for Aluminium Dissolution in Acidic Medium".International Journal of Electrochemical Science 5.7(2010):994-1007.