The inhibition effect of 1,3,5-triazinyl urea derivatives, viz. 1-(4-cyclohexyl amino)-6-(3,4-dimethoxy phenyl ethyl amino)-1,3,5-triazin-2-yl)-3-p-tolyurea (4-CADT) and 1-(4-chlorophenyl)-3-(4-(cyclohexyl amino)-6-(3,4-dimethoxy phenyl ethyl amino)-1,3,5-triazin-2-yl) urea (4-CCADT), were evaluated against mild steel (MS) corrosion in 1 N HCl solutions using conventional weight loss, potentiodynamic polarization, linear polarization, electrochemical impedance spectroscopy, and scanning electron microscopic studies. The losses in weights of MS samples have proved that both were efficient corrosion inhibitors. The mixed mode of inhibition was confirmed by electrochemical polarizations and the results of electrochemical impedance spectroscopy have shown the changes in the impedance parameters like charge transfer resistance and double-layer capacitance to confirm the strong adsorption on the MS surface inhibition of MS. The changes in concentrations of the inhibitors were due to the adsorption of the molecules evaluated leading to the formation of a protective layer on the surface of MS. The inhibition action of these compounds was assumed to occur via adsorption on the steel surface through the active centers contained in the molecules.
Research on Chemical Intermediates – Springer Journals
Published: Jan 23, 2011
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