Inhibition of mild steel corrosion in HCl solution using chitosan

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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 f...

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Detalles Bibliográficos
Autores principales: Umoren, Saviour Alphonsus, Banera, Mauro Jonathan, Alonso García, Teodoro, Gervasi, Claudio Alfredo, Mirífico, María Virginia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Ingeniería
Chitosan
Mild steel
Acid corrosion
Corrosion inhibition
Natural polymer
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/137338
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-137338
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Ingeniería
Chitosan
Mild steel
Acid corrosion
Corrosion inhibition
Natural polymer
spellingShingle Ciencias Exactas
Ingeniería
Chitosan
Mild steel
Acid corrosion
Corrosion inhibition
Natural polymer
Umoren, Saviour Alphonsus
Banera, Mauro Jonathan
Alonso García, Teodoro
Gervasi, Claudio Alfredo
Mirífico, María Virginia
Inhibition of mild steel corrosion in HCl solution using chitosan
topic_facet Ciencias Exactas
Ingeniería
Chitosan
Mild steel
Acid corrosion
Corrosion inhibition
Natural polymer
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.
format Articulo
Articulo
author Umoren, Saviour Alphonsus
Banera, Mauro Jonathan
Alonso García, Teodoro
Gervasi, Claudio Alfredo
Mirífico, María Virginia
author_facet Umoren, Saviour Alphonsus
Banera, Mauro Jonathan
Alonso García, Teodoro
Gervasi, Claudio Alfredo
Mirífico, María Virginia
author_sort Umoren, Saviour Alphonsus
title Inhibition of mild steel corrosion in HCl solution using chitosan
title_short Inhibition of mild steel corrosion in HCl solution using chitosan
title_full Inhibition of mild steel corrosion in HCl solution using chitosan
title_fullStr Inhibition of mild steel corrosion in HCl solution using chitosan
title_full_unstemmed Inhibition of mild steel corrosion in HCl solution using chitosan
title_sort inhibition of mild steel corrosion in hcl solution using chitosan
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/137338
work_keys_str_mv AT umorensaviouralphonsus inhibitionofmildsteelcorrosioninhclsolutionusingchitosan
AT baneramaurojonathan inhibitionofmildsteelcorrosioninhclsolutionusingchitosan
AT alonsogarciateodoro inhibitionofmildsteelcorrosioninhclsolutionusingchitosan
AT gervasiclaudioalfredo inhibitionofmildsteelcorrosioninhclsolutionusingchitosan
AT mirificomariavirginia inhibitionofmildsteelcorrosioninhclsolutionusingchitosan
bdutipo_str Repositorios
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