The Open Materials Science Journal

2014, 8 : 71-80
Published online 2014 September 29. DOI: 10.2174/1874088X01408010071
Publisher ID: TOMSJ-8-71

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 , Nasser A. Jamal Abdul and Rajendran S.
PG & Research Department of Chemistry, Jamal Mohamed College, Tiruchirappalli 620 020, India.

ABSTRACT

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.