Abstract
The corrosion inhibition effect of Sida cordifolia extract, a perennial subshrub of the mallow family Malvaceae, has been examined on mild steel corrosion in 0.5 M H2SO4 by using weight loss measurements, potentiodynamic polarization measurements and electrochemical impedance spectroscopy (EIS) techniques. The presence of this Vasicinone, Vasicine and Vasicinol containing extract decreases the corrosion rate of mild steel in acidic solution. The best inhibition effect of Sida cordifolia extract for mild steel in 0.5 M H2SO4 was obtained at 500 mg/L using electrochemical and weight loss measurements. The adsorption of Sida cordifolia extract on the surface of mild steel has been investigated by using AFM study, SEM study and absorption spectroscopic techniques. Due to the existence of hetero atoms in the main components, Sida cordifolia extract is considered to be a good inhibitor.
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