A Study on the Inhibition of Copper Corrosion in Sulphuric Acid by Aqueous Extract of Leaves of Morinda tinctoria

被引：21
作者：
Krishnaveni K. [1 ]
Ravichandran J. [1 ]
机构：
[1] PG and Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore, 641020, Tamil Nadu
来源：
Journal of Failure Analysis and Prevention | 2015年 / 15卷 / 5期
关键词：
Acid corrosion; Copper; EIS; SEM-EDXS; Weight loss;
D O I：
10.1007/s11668-015-0002-0
中图分类号：
学科分类号：
摘要：
The corrosion of copper in 0.25 M sulphuric acid was studied by the addition of aqueous extract of leaves of Morinda tinctoria using weight loss and electrochemical methods. The addition of inhibitor moderately improves the inhibition efficiency. Increase in temperature and acid concentration decreases the performance of the inhibitor. The adsorption of the inhibitor on the copper surface in sulphuric acid medium obeys Freundlich isotherm. The AC impedance studies reveal that the process of inhibition is through charge transfer reaction, and polarization studies indicate the mixed nature of the inhibitor. © 2015, ASM International.
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页码：711 / 721
页数：10
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