Published Paper Details:

In this study, we report the study of the inhibition effect of Nardostachys jatamansi root extract on corrosion of mild steel in hydrochloric acid using weight loss measurements and electrochemical techniques. The inhibitor efficiency of Nardostachys jatamansi root extract was found to vary with concentration was kept uniform for 24 h and temperatures were kept uniform for 2 h. Experimental results revealed that inhibition efficiency (I.E %) increased with increasing inhibitor concentration. As temperatures increased, a percentage of inhibition decreases. Experimental results revealed that inhibition efficiency (I.E %) increased with increasing inhibitor concentration. As temperatures increased, a percentage of inhibition decreases. The inhibitive and adsorptive characteristics of ethanol extract of Nardostachys jatamansi root extract for the corrosion of mild steel (MS) in 1M HCl solutions have been studied using following methods for monitoring corrosion. Ethanol extract of Nardostachys jatamansi root extract is a good adsorption inhibitor for the corrosion of mild steel in HCl. The methods used were weight loss, an effect of temperature, polarization and Electrochemical Impedance Spectroscopic (EIS). The inhibition efficiency(I.E.) increases with inhibitor concentration. The adsorption study of these compounds of mild steel surface found to obey Nardostachys jatamansi root extract adsorption isotherm. The value of free energy of adsorption ( ?G0ads ), a heat of adsorption (Quads), the energy of activation (Ea), enthalpy of adsorption( ?H0ads) and entropy of adsorption ( ?S0ads) were calculated. The present study indicates that Nardostachys jatamansi root extract is a good inhibitor for the corrosion of Mild steel in the hydrochloric acid medium.