EFFICACY OF SEED EXTRACTS OF MOMORDICA CHARANTIA ON THE CORROSION INHIBITION OF MILD STEEL IN 1N HCl MEDIUM USING PHYTOCHEMICAL SCREENING, WEIGHT LOSS MEASUREMENTS AND QUANTUM CHEMICAL STUDIES

chemistry, corrosion science

Extract of Momordica Charantia Seed (MCS) was investigated as corrosion inhibitor of mild steel in 1N HCl using phytochemical screening, conventional weight loss, and theoretical analysis. Weight loss results showed that MCS seed extracts are good corrosion inhibitors. Inhibition efficiency increased with increase in concentration of inhibitor and decreased with temperature. The maximum inhibition efficiency was 95.06% in case of MCS extract in 1N HCl for immersion period of 7h at a concentration of 2.5 %v/v. Quantum studies revealed that inhibition was due to adsorption of active molecules leading to formation of a protective layer on surface of mild steel. Quantum chemical parameters such as highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) energy levels, HOMO–LUMO energy gap and electronic density were virtually identified. Quantum analysis demonstrated reactive centres of electrophilic and nucleophilic attack and strong inhibition properties of bioactive molecules of MCS extract.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.