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Inhibitive action of 3-Hydroxy-3-(4methylphenyl-1-(4-sulphonato (sodium salt) phenyl triazene on Corrosion of Copper in HCl medium

Author Affiliations

  • 1Coordination Laboratory, Department of Chemistry, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, INDIA

Res.J.chem.sci., Volume 5, Issue (2), Pages 59-63, February,18 (2015)

Abstract

Corrosion inhibition of copper in 1N HCl solution by 3-Hydroxy-3-(4-methylphenyl)-1-(4-sulphonato (sodium salt) phenyl) triazene (HPST) has been studied using weight loss techniques at temperatures ranging from 303 to 343 K. It is observed that the proposed organic compound exhibit 84.4% inhibition efficiency at 303 K temperature in 1N HCl solution . Increase the concentration of HPST inhibition efficiency increases whereas increase in temperature decreases inhibition efficiency. The inhibitior show maximum inhibition efficiency for 0.002 M concentration of HPST at 303 K temperature. Activation energy (Ea), Enthalpy (ΔH),Entropy (ΔS) and Gibbs free energy have also been reported. The Langmuir isotherm was found to accurately describe the adsorption behavior of the compound.

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