Corrosion Inhibition of Mild Steel in Acid Medium using MUSA AcuminataFlower Extract
J. Environ. Nanotechnol. Volume 2, No.4 (2013) pp.45-50
The corrosive inhibitive effect of Musa acuminata flower [MAN (F)] extract in 1N H2SO4 on mild steel was evaluated using conventional weight loss, electrochemical polarization, impedance spectroscopy and scanning electron microscopy methods. The inhibition efficiency of MAN (F) increases with increase in concentration but decreases with increase in temperature. The polarization curves indicate that MAN (F) acts as a mixed type of inhibitor. Electrochemical impedance plots shows change in charge transfer capacitance with change inconcentration of inhibitor. Temkin adsorption isotherm was tested for its fit to experimental data. SEM study shows that inhibited metal surface is smoother than uninhibited surface indicating reduction of corrosion. A mechanism of physical adsorption is proposed for inhibition action.
Anhwange, B. A., Chemical Composition of Musa sapientum (Banana) Peels J. Food Tech., 6, 263 -266(2008).
Evans, W. C., Trease and Evans Pharmacognosy, W. B. Saunders, New York, (2002).
Fontana, M. G., Corrosion Engineering III Edn, Tata Mc Graw-Hill Edn Pvt Ltd, New Delhi, (2010).
Lebrini, M., Robert, F., Lecante, A., Roos, C., Corrosion inhibition of C38 steel in 1M hydrochloric acid medium by alkaloids extract from Oxandra asbeckii plant, Corros. Sci., 53, 687-695(2011).
Mokbel, M. S., Hashinaga, F., Antibacterial and Antioxidant Activities of Banana (Musa, AAA cv. Cavendish) Fruits Peel., Am. J. Biochem. Biotechnol., 1, 125-131(2005).
Narayan, R., An introduction to metallic corrosion and its prevention, Oxford and IBH Publishing Co, New Delhi, (1983).
Okafor, P. C., Ebenso, E. E., Ekpe, U. J., Azadirachta indica extracts as corrosion inhibitor for mild steel in acid medium, Int. J. Electrochem. Sci., 5, 978-993(2010).
Radha, T., Mathew, L., Fruit Crops; K. V. Peter (Ed) : Horticulture Science Series, New India Publishing Agency, New Delhi, (2007).