Corrosion Inhibition of Aluminium by Treculia Africana Leaves Extract in Acid Medium

被引：10
作者：
Ejikeme, P. M. [1 ]
Umana, S. G. [1 ]
Onukwuli, O. D. [2 ]
机构：
[1] Univ Nigeria, Dept Pure & Ind Chem, Biomass & Ind Chem Res Lab, Nsukka, Nigeria
[2] Nnamdi Azikiwe Univ, Dept Chem Engn, Awka, Nigeria
来源：
PORTUGALIAE ELECTROCHIMICA ACTA | 2012年 / 30卷 / 05期
关键词：
weight loss; aluminium; heat of adsorption; activation energy; adsorption isotherm;
D O I：
10.4152/pea.201205317
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The inhibitive effect of Treculia Africana leaves extract (TALE) in the corrosion of aluminium in HCl solution was studied using weight loss and thermometric methods at 30 - 60 degrees C. The results showed that TALE acted as a corrosion inhibitor of aluminium in HCl. Inhibition efficiency increased with increase in TALE concentration, but decreased with increase in temperature. TALE interaction with the metal surface was found to obey Freundlich and El-Awady adsorption isotherms. The obtained heats of adsorption values were negative. A phenomenon of physical adsorption is proposed for the adsorption behavior of TALE.
引用
收藏
页码：317 / 328
页数：12
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