A. Manivel, S. Ramkumar, Jerry J. Wu
Mar 1, 2014
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Influential Citations
26
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Journal
Journal of environmental chemical engineering
Abstract
This study deals with the possibility of (S)-4,5,6,7-tetrahydrobenzo[d]thiazole-2,6-diamine (TDA) as a prospective corrosion inhibitor for mild steel in 1 M hydrochloric acid (HCl) medium. The inhibition characteristics by means of weight loss, Tafel polarization and electrochemical impedance spectroscopic methods are reported. Results showed that the inhibition efficiencies increase with increasing concentration and while increasing temperature it shows negative effect. Associated equilibrium adsorption constant and other thermodynamic parameters suggested that TDA follows comprehensive adsorption behavior in blocking the active corrosion sites. Morphological investigation of corrosion sites was carried out by using scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies, which reveal that the inhibition occurs due to the adsorption of the inhibitor molecules on the metal surface.