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Corrosion Inhibition of Amino Pentadecylphenols (APPs) Derived from Cashew Nut Shell Liquid on Mild Steel in Acidic Medium
Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
Physical Sciences Department, Sokoine University of Agriculture, Morogoro, Tanzania
- 1 Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
- 2 Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania
- 3 Physical Sciences Department, Sokoine University of Agriculture, Morogoro, Tanzania
Materials Sciences and Applications·Volume 07 (2016)·Pages 396–402·Published 5 August 2016·DOI10.4236/msa.2016.78036
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Abstract
In this study, corrosion inhibiting properties of amino pentadecylphenols (APPs) derived from Cashew Nut Shell Liquid (CNSL) on mild steel in aerated 0.10 M HCl at 303 K were studied using Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization measurements. Both methods indicated the potential of a mixture of amino pentadecyphenols to serve as a corrosion inhibitor in mild steel in 0.10 M HCl. Corrosion inhibition efficiencies were observed to increase with increase in the inhibitor concentration, with maximum corrosion inhibition of about 98% at inhibitor concentration of 600 ppm. The adsorption of the inhibitor on mild steel surface was found to obey Temkin adsorption isotherm, signifying physical adsorption of the inhibitor molecules on mild steel surface.
KeywordsCorrosion InhibitorCashew Nut Shell LiquidAmino PentadecylphenolsMild Steel
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