Inhibitive effect of leaf extracts of Durenta Erecta on Mild Steel corrosion in 1M Hydrochloric and 0.5M Sulphuric acid solution

The inhibitive action as anticipated depended on the concentration of the inhibitor, period of immersion and temperature of the attacking acid. The results obtained from the study the acid extract of Durentaerecta leaf could bring out maximum inhibition of 98.6% in 1M HCL and 99.5% in 0.5M H2SO4 acid at room temperature. The absorption of the inhibitor on surface of mild steel was found to be Langmuir and Temkin adsorption isotherm which indicated the mono layer formation with heterogeneity in the surface of the electrode. Maximum efficiency of 96.8% in 1M HCl and 60.9% in 0.5M H2SO4 from icorr and Rp were obtained. Results from the polarization techniques such as Tafel and impedance spectroscopy could be comparable with the classical mass loss methods.