Artículo
Inhibition of mild steel corrosion in HCI solution using chitosan
Umoren, Saviour E.; Banera, Mauro
; Alonso Garcia, Teodoro; Gervasi, Claudio; Mirifico, Maria Virginia
Fecha de publicación:
15/08/2013
Editorial:
Springer
Revista:
Cellulose
ISSN:
0969-0239
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The efficiency of chitosan (a naturally occurring polymer) as a corrosion inhibitor for mild steel in 0.1 M HCl, was investigated by gravimetric, electrochemical and spectroscopic measurements (SEM observations 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 corrosion 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.
Palabras clave:
Chitosan
,
Mild Steel
,
Acid Corrosion
,
Corrosion Inhibition
,
Natural Polymer
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Citación
Umoren, Saviour E.; Banera, Mauro; Alonso Garcia, Teodoro; Gervasi, Claudio; Mirifico, Maria Virginia; Inhibition of mild steel corrosion in HCI solution using chitosan; Springer; Cellulose; 20; 5; 15-8-2013; 2529-2545
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