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Prasanna B.M.,Shree Tharalabalu Jagadguru Institute of Technology | Venkatesha V.T.,Kuvempu University | Abd Hamid S.B.,University of Malaya
Journal of Adhesion Science and Technology | Year: 2015

The corrosion inhibition efficiency of ketosulfide was investigated by electrochemical methods in 1 M HCl solution at 303-333 K. The polarization method showed mixed-type inhibition characteristics of ketosulfide. Adsorption behavior of ketosulfide was studied and which followed the Langmuir adsorption isotherm. Thermodynamic parameters were also calculated using Gibbs Helmholtz, Vant Hoff and basic themodynamic equations. Activation parameters were calculated using Arrhenius and transition state equations. The morphology of mild steel surface was examined by scanning electron microscopic images in the absence and presence of ketosulfide. © 2015 Taylor & Francis.

Hebbar N.,Bearys Institute of Technology | Prasanna B.M.,Shree Tharalabalu Jagadguru Institute of Technology | Venkatesha T.V.,Kuvempu University
International Journal of Industrial Chemistry | Year: 2015

Corrosion inhibition of Floctafenine for zinc in 0.1 M HCl solution was studied using empirical and theoretical methods. Quantum studies have been utilized for studying the interaction between metal and inhibitor. Empirical methods like potentiodynamic polarization and electrochemical impedance spectroscopy were adopted to verify the inhibition efficiency of the inhibitor. Adsorption of the inhibitor follows the Langmuir isotherm. Thermodynamic values show the physical adsorption mechanism of the inhibitor. Activation and thermodynamic parameters explain the corrosion mechanism. The effect of temperature on the corrosion behavior of zinc in the given temperature range 303–333 K was studied and discussed. © 2015, The Author(s).

Hebbar N.,Bearys Institute of Technology | Mathad P.B.,Shree Tharalabalu Jagadguru Institute of Technology | Venkatesha V.T.,Kuvempu University | Pavithra K.M.,Kuvempu University
Journal of Corrosion Science and Engineering | Year: 2014

Corrosion inhibition of mild steel by a non toxic Anti HIV drug Tenofovir Disproxil Fumarate(TDF) has been investigated by using chemical and electrochemical methods such as weight loss, polarization and electrochemical impedance techniques. The experimental results suggested that, TDF is a good corrosion inhibitor for mild steel in 1M Hydrochloric acid medium. The inhibition efficiency increased with increasing of inhibitor concentration. The adsorption of TDF obeys Langmuir adsorption isotherm by following chemisorption mechanism. The results obtained from both chemical and electrochemical techniques are in good agreement with each other. Activation parameters and The quantum chemical approaches are discussed. © 2014 University of Manchester and the authors.

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