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Citrus sinensis peels as a Green Corrosion Inhibitor for Mild Steel in 5.0 M Hydrochloric Acid Solution

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Author Affiliations

  • 1Electrochem. and Mat. Sci. Lab., Dept. of Chemistry, Ch. Devi Lal University, Sirsa, 125 055, Haryana, INDIA

Res.J.chem.sci., Volume 6, Issue (1), Pages 53-60, January,18 (2016)

Abstract

Corrosion characteristics of dried peels of Citrus sinensis (sweet orange) on mild steel (MS) in 5.0 M HCl solution was studied by Weight loss, Gasometric, Electrochemical Polarization and Impedance Spectroscopic techniques. The percentage corrosion inhibition efficiency (PCIE) increases with increase in concentration of the Citrus sinensis from 0.1 to 4.0 g/l. Polarization measurement indicates that Citrus sinensis acts as mixed-type corrosion inhibitor. The corrosion protection to metal surface was provided via adsorption of green corrosion inhibitor. SEM and Metallurgical Research Microscopy study proves adsorption of green corrosion inhibitor (CI) molecules on MS surface. More than 93.0 PCIE was observed for MS at 4.0 g/l of Citrus sinensis in 5.0 M HCl solution.

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