Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry


Using pectin extract as eco-friendly inhibitor for steel corrosion in 1M HCl media

Author(s): N. Saidi, H. Elmsellem, M. Ramdani, A. Chetouani, K. Azzaoui, F. Yousfi, A. Aouniti and B. Hammouti

Corrosion inhibition of mild steel in 1 M HCl was investigated in the absence and presence of different concentrations of pectin extracted from opuntia cladodes. Weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy techniques were employed. Impedance measurements showed that the double-layer capacitance decreased and charge-transfer resistance increased with increase in the inhibitor concentration and hence increasing in inhibition efficiency. Potentiodynamic polarization study showed that the inhibitor act as cathodic-type inhibitor. The inhibition efficiency was found to increase with inhibitor content to attain 96% in the presence of1g/l at 308K. Data obtained from EIS studies were analyzed to determinate the model inhibition process through appropriate equivalent circuit models. Inhibition efficiency E (%) obtained from the various methods was in good agreement. The associated activation energy has been determined. The adsorption of pectin on the steel surface was found obey to Langmuir’s adsorption isotherm