Inhibition Effect of Copper Complex of 1-(8-Hydroxy Quinolin-2-yl- Methyl) Thiourea on the Corrosion of Mild Steel in Sodium Chloride Solution

Abuthahir S.S. Syed*, 1, 2, Nasser A. Jamal Abdul1, Rajendran S.2
1 PG & Research Department of Chemistry, Jamal Mohamed College, Tiruchirappalli 620 020, India
2 Department of Chemistry, RVS School of Engineering and Technology, Dindigul-624 005, India

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© 2014 Abuthahir et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



The Corrosion inhibition of an inhibitor namely Copper complex of 1-(8-hydroxy quinolin-2-yl-methyl) thiourea (Cu-HTF) which controls the corrosion of mild steel immersed in an aqueous solution containing 60 ppm Cl- has been investigated through electrochemical and mass loss method. The formulation consisting of 60 ppm of Cl- and 50 ppm of Cu-HTF offers good inhibition efficiency of 78 %. Polarization study shows that this formulation acts as a cathodic inhibitor.AC impedance spectra indicate that a protective film is formed on the mild steel surface. Fluorescence spectral analysis was used to detect the presence of iron-inhibitor complex. The surface morphology has been analyzed by FTIR, UV-Visible spectroscopy, Scanning Electron Microscope (SEM) and EDAX. Cu-HTF has the ability to prevent the growth of certain microorganisms such as E. coli, Streptococcus, Pseudomonas and Enterobacter.

Keywords: Biocidal activity, corrosion inhibition, EIS, mild steel, SEM, transition metal complex.