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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Inhibition of mild steel corrosion in HCl solution using chitosan
Cellulose, Volume 20, No. 5, Year 2013
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Description
The efficiency of chitosan (a naturally occurring polymer) as a corrosion inhibitor for mild steel in 0.1 M HCl was investigated by gravimetric, potentiodynamic polarization, electrochemical impedance spectroscopy measurements, scanning electron microscopy, and UV-visible analysis. The polymer was found to inhibit corrosion even at a very low concentration. Inhibition efficiency increases with a rise in temperature up to 96 % at 60 °C and then drops to 93 % at 70 °C, while it slightly increases with an increase in chitosan concentration. Polarization curves indicate that chitosan functions as a mixed inhibitor, affecting both cathodic and anodic partial reactions. Impedance results indicate that chitosan was adsorbed on the metal/solution interface. Adsorption of chitosan at the mild steel surface is found to be in agreement with Langmuir adsorption isotherm model. Chemical adsorption is the proposed mechanism for corrosion inhibition considering the trend of protection efficiency with temperature. Calculated kinetic and thermodynamic parameters corroborate the proposed mechanism. © 2013 Springer Science+Business Media Dordrecht.
Authors & Co-Authors
Umoren, Saviour Alphonsus
Argentina, La Plata
Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas Conicet- Universidad Nacional de la Plata
Nigeria, Uyo
University of Uyo
Banera, Mauro J.
Argentina, La Plata
Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas Conicet- Universidad Nacional de la Plata
Alonso-Garcia, Teodoro
Spain, Donostia-san Sebastian
Cic Biomagune
Gervasi, Claudio Alfredo
Argentina, La Plata
Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas Conicet- Universidad Nacional de la Plata
Argentina, La Plata
Universidad Nacional de la Plata
Mirífico, María Virginia
Argentina, La Plata
Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas Conicet- Universidad Nacional de la Plata
Argentina, La Plata
Universidad Nacional de la Plata
Statistics
Citations: 140
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1007/s10570-013-0021-5
ISSN:
09690239