Abstract
The corrosion inhibition of mild steel by leave extract of Pennisetum purpureum (PP) in 1 M HCl and H_2 SO_4 was studied using gravimetric, electrochemical and computer simulation methods of corrosion monitoring. The results obtained showed that the PP extract retarded the mild steel corrosion in both acidic solutions and that inhibition efficiency improved with concentration increase but decreased gradually with prolonged exposure time. Electrochemical results revealed that the extract reduced both the anodic and cathodic corrosion reactions by the adsorption of some of its chemical constituents on the metal surface. To further confirm the adsorption characteristics of the extract, some of its constituents were simulated using density functional theory simulation method.
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