Leaves Extract of Grevillea Robusta as Eco-Friendly Corrosion Inhibitor for Mild Steel in 1N Hydrochloric Acid Medium

V. Kavitha
Department of Chemistry, Nirmala College for Women, Coimbatore , IN

Dr. N. Gunavathy
Department of Chemistry, Nirmala College for Women, Coimbatore , IN

C. B. Bhavana
Department of Chemistry, Nirmala College for Women, Coimbatore , IN

Keywords: — Grevillea robusta, weight loss method, quantum chemical studies, bioactive compounds, corrosion inhibitor

Abstract

An attempt was made to characterize leaf extracts of Grevillea robusta (GRL) by phytochemical screening, weight loss method, FTIR, surface examination analysis and quantum chemical studies. Influence of bioactive compounds in Grevillea robusta leaf extract contributes for adsorption properties towards Mild Steel (MS). The maximum inhibition efficiency of GRL extract was 97.05 % in 1N HCl for immersion period of 5 h at 2.5 % v / v. SEM analysis confirmed formation of protective layer on mild steel surface. Inhibition efficiency was found to increase with increasing concentration of GRL extract at room temperature. Results from various studies show that GRL can serve as an effective inhibitor for mild steel corrosion in 1N HCl medium.

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