Abstract
Inhibition action of Syzygium jambos leaf extract on corrosion of mild steel in 1 M HCl was evaluated through mass loss measurements, potentiodynamic polarization and electrochemical impedance spectroscopic techniques. Temperature studies revealed a decrease in efficiency with rise in temperature and corrosion activation energies increased in the presence of the extract. Inhibition action of the inhibitor is explained by adsorption process, and it follows Langmuir adsorption isotherm. Thermodynamic data for inhibitor adsorption suggest the occurrence of physical and chemical adsorption of the extract on mild steel in 1 M HCl solution. The results were supplemented by FTIR and scanning electron microscopy.
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