Journal of Failure Analysis and Prevention

, Volume 15, Issue 5, pp 711–721 | Cite as

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

Technical Article---Peer-Reviewed

Abstract

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.

Keywords

Copper EIS Weight loss SEM-EDXS Acid corrosion 

Notes

Acknowledgment

The authors wish to acknowledge the Post Graduate and Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore-20 for providing the facilities.

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Copyright information

© ASM International 2015

Authors and Affiliations

  1. 1.PG and Research Department of ChemistrySri Ramakrishna Mission Vidyalaya College of Arts and ScienceCoimbatoreIndia

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