ELECTROCHEMICAL STUDY OF THE CORROSION BEHAVIOR OF MILD STEEL WITH ZINC COMPLEX OF 1-(8-hydroxy quinolin-2yl-methyl) THIOUREA AS INHIBITOR IN SODIUM CHLORIDE SOLUTION
S. S. SYED ABUTHAHIR *
Department of Chemistry, Jamal Mohamed College, Tiruchirappalli- 620 020, India and Department of Chemistry, RVS School of Engineering and Technology, Dindigul-624 005, India
A. JAMAL ABDUL NASSER
Department of Chemistry, Jamal Mohamed College, Tiruchirappalli- 620 020, India
S. RAJENDRAN
Department of Chemistry, RVS School of Engineering and Technology, Dindigul-624 005, India
K. VIJAYA
Department of Chemistry, PSNA College of Engineering and Technology, Dindigul, India
*Author to whom correspondence should be addressed.
Abstract
The Corrosion inhibitive behavior of Zinc complex of 1-(8-hydroxy quinolin-2yl-methyl) thiourea (Zn-HTF) on mild steel immersed in an aqueous solution containing 60 ppm Cl- has been evaluated by using mass loss method. The corrosion inhibition efficiency shows 80% by 50 ppm of Zn-HTF. The corrosion inhibition was observed due to the formation of more stable and compact protective film on the mild steel surface. Polarization study and Electrochemical Impedance spectra were applied to analyze the effect of the inhibitor on the corrosion of mild steel. Fourier transform infrared & UV-Visible spectroscopy was used to characterize the surface film. Iron-inhibitor complex that totally covered the mild steel surface was identified by fluorescence spectra. The morphology of inhibited and uninhibited mild steel was analyzed by scanning electron microscope (SEM) and energy dispersive analysis of X-rays (EDAX). Zn-HTF has the ability to prevent the growth of certain microorganisms.
Keywords: Biocidal activity, corrosion inhibition, EIS, FTIR, EDAX, mild steel, SEM, transition metal complex