Influence of Ocimum tenuiflorum Extract on Mild Steel in Acid Environment Rani P. Deepa1,*, Selvaraj S.2 1Dept. of Chemistry, Post Graduate and Res. Centre, Sri Paramakalyani College, Alwarkurichi-627412, T. N., India 2Department of Chemistry, Faculty of Chemistry, Post Graduate and Research centre, Sri Paramakalyani College, Alwarkurichi-627412, Tamil Nadu, India *Corresponding Author E-mail: rani.Deeps@yahoo.in
Online published on 6 March, 2013. Abstract The inhibition effect of Ocimum tenuiflorum extract on the corrosion of mild steel in 2M Sulphuric acid has been studied at different temperature as well as concentrations of inhibitor by mass loss studies. The inhibition efficiency is markedly higher in H2SO4 environment with addition of Ocimum tenuiflorum extract compared with those in the inhibitor free solution. The inhibition efficiency increased with increase of inhibitor concentration but decreased with increase in temperature and exposure time. Adsorption of Ocimum tenuiflorum extract on mild steel is found to obey Langmuir, Temkin, Flory-Huggins and Frumkin adsorption isotherm. The characterization of corrosion product on mild steel in the presence of inhibitor is analyzed by UV, IR, and XRD. Top Keywords Corrosion inhibition, mild steel, mass loss, Ocimum tenuiflorum. Top |