Abstract
Inhibition performance of concentrations of methanolic extract of Dracaena arborea leaves on mild steel corrosion in 2.0 M HCl was examined, using electrochemical and gravimetric methods. Inhibition efficiency increases with increase in concentration of the inhibitor. Kinetic, thermodynamic and adsorption behaviour of the process were investigated. Results revealed that the inhibition occurred due to the molecular adsorption of the constituents of the extract on mild steel in acidic medium. Potentiodynamic polarization results affirmed that the extract act as a mixed-type inhibitor. EIS study revealed that S1 (81.5%) has a comparatively better inhibition efficiency than S2 (72.7%).
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