文章基本信息

标题：Corrosion inhibition performance of Coriander Seeds extract molecules for pure Aluminum in Hydrochloric acid Medium: A combined Experimental and Quantum chemical approach
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作者：Shah N.K. ; Ladha D.G. ; Wadhwani P.M. 等
期刊名称：Research Journal of Recent Sciences
电子版ISSN：2277-2502
出版年度：2016
卷号：5
期号：1
页码：27-34
语种：English
出版社：International Science Community Association
摘要：The study of inhibitive properties of coriander seeds extract (CSE) molecules over Aluminum surface in 1M hydrochloric acid (HCl) medium was performed by standard weight loss(gravimetric) and electrochemical impedance methods. Result from gravimetric measurements showed that behavior of inhibition efficiency is directly proportional to concentration of inhibitor. Impedance measurement reveals that charge transfer resistance and constant phase element values increases and decreases respectively with increase in concentration of inhibitor. The study indicates that the molecules present in the extract forms a protective layer at metal/solution interface. In addition quantum chemical study was also performed using density functional theory (DFT) to elucidate the inhibitory activity of individual molecule present in the extract. The result from quantum study showed that 10, 12-Hexadecadien-1-ol had the maximum power of adsorption at Aluminum surface to prevent it from corrosion.
关键词：Corrosion inhibition;coriander seed extract;gravimetric method;electrochemical impedance spectroscopy;HCl;DFT