Abstract
The corrosion inhibition effect of Areca root extract on the mild steel (MS) surface in the 3 M HCl solution was examined by gasometric, colorimetric, Tafel plot, impedance and atomic absorption spectroscopy techniques. Gasometric studies show that, the extract behaves as green corrosion inhibitor in the 3 M HCl system on the MS surface. The protection rate enhances with a rise in the plant extract concentration. Colorimetry studies show that, minimum weight loss observed at 0.4 g/L of plant extract. The minimum weight loss of MS in the 3 M HCl solution is an indication of protection property of Areca root extract. Atomic absorption spectroscopy technique shows that, increase in the amount of Areca root extract increases the protection inhibition property. Mixed corrosion inhibition property of Areca root extract was confirmed from the potentiodynamic polarization technique. Trend of charge transfer resistance values with different amounts of plant extract also supports the corrosion inhibition property of Areca root extract. SEM studies fully support the gasometric, colorimetric, Tafel plot, impedance and atomic absorption spectroscopy techniques.
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