ELECTROCHEMICAL AND SURFACE ANALYSIS STUDIES ON
CORROSION INHIBITION OF MILD STEEL BY 1-(8-HYDROXY
QUINOLIN-2-YLMETHYL)THIOUREA
S. S. Syed Abuthahir, A. Jamal Abdul Nasser, S. Rajendran.
Abstract
1-(8-Hydroxyquinolin-2yl-methyl)thiourea (HTF) has been used as a corrosion inhibitor in controlling corrosion of mild steel immersed in
aqueous solution containing 60 ppm of Cl-
. Weight loss method reveals that 250 ppm of HTF + 25 ppm of Zn2+ provide 95% of inhibition
efficiency. Polarization study indicates that the system controls anodic reaction predominantly. AC impedance spectra reveal that a
protective film is formed on the metal surface. The protective film has been analyzed using Fourier Transform Infrared and fluorescence
spectra.
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