Utilization of watermelon rind extract as a green corrosion inhibitor for mild steel in acidic media
By N.A. Odewunmi and S.A. Umoren and Z.M. Gasem
Published in Journal of Industrial and Engineering Chemistry
NULL
2015
Abstract
Electrochemical techniques were used to investigate the efficacy of watermelon rind extract (WMRE) as corrosion inhibitor for mild steel in \HCl\ and \H2SO4\ solutions. The inhibition efficiency increased as the concentration of the extract increases. Potentiodynamic polarization results indicate that \WMRE\ act as a mixed-type inhibitor. The values of effective capacitance obtained by utilizing the impedance parameters in both acidic media are in the range of double layer capacitance. Corrosion inhibition effect of \WMRE\ can be attributed to the adsorption of constituents of \WMRE\ onto the mild steel surface which can be approximated by Temkin adsorption isotherm model.
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