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Abstract:

The corrosion behavior of mild steel in CO2-saturated 5% NaCl solution with N-[2-[(2-aminoethyl) amino] ethyl]-9-octadecenamide corrosion inhibitor at 25 °C has been studied by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and Polarization Modulation Infrared Reflection Absorption Spectroscopy (PM-IRRAS) measurements. Both potentiodynamic polarization and EIS measurements reveal that this amido-amine precursor inhibits the carbon steel corrosion and the inhibition efficiency increases with increasing the inhibitor concentration. The corrosion inhibitor exhibits high corrosion efficiencies as a mixed-type inhibitor, with a predominant influence on the anode process. The organic inhibitor acts blocking surface sites at low concentrations and by modifying the adsorption mechanism forming a protective barrier against corrosive ions at high concentrations. EIS results show that the mechanism of its corrosion inhibition at concentrations higher than 0.82 × 10-5 M is by forming a protective bilayer with small pore sizes that hinders the passage of the reactive species. PM-IRRAS measurements demonstrate that the inhibitor is chemisorbed to surface steel. Therefore, its spectrum reveals that the inhibitor monolayer has an amorphous structure. © 2011 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Amphiphilic amido-amine as an effective corrosion inhibitor for mild steel exposed to CO2 saturated solution: Polarization, EIS and PM-IRRAS studies
Autor:Desimone, M.P.; Grundmeier, G.; Gordillo, G.; Simison, S.N.
Filiación:División Corrosión, INTEMA, UNMdP-CONICET, Juan B. Justo 4302, B7608FDQ, Mar del Plata, Argentina
Department of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany
INQUIMAE (CONICET), DQIAQF, Ciudad Universitaria, Pabellón 2, Buenos Aires, Argentina
Palabras clave:CO2 corrosion; EIS; Mild steel; PM-IRRAS; Polarization curves; CO2 corrosion; EIS; Mild steel; PM-IRRAS; Polarization curves; Absorption spectroscopy; Adsorption; Carbon steel; Chemisorption; Concentration (process); Corrosion prevention; Electrochemical corrosion; Electrochemical impedance spectroscopy; Monolayers; Organic compounds; Polarization; Potentiodynamic polarization; Sodium chloride; Corrosion inhibitors
Año:2011
Volumen:56
Número:8
Página de inicio:2990
Página de fin:2998
DOI: http://dx.doi.org/10.1016/j.electacta.2011.01.009
Título revista:Electrochimica Acta
Título revista abreviado:Electrochim Acta
ISSN:00134686
CODEN:ELCAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v56_n8_p2990_Desimone

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Citas:

---------- APA ----------
Desimone, M.P., Grundmeier, G., Gordillo, G. & Simison, S.N. (2011) . Amphiphilic amido-amine as an effective corrosion inhibitor for mild steel exposed to CO2 saturated solution: Polarization, EIS and PM-IRRAS studies. Electrochimica Acta, 56(8), 2990-2998.
http://dx.doi.org/10.1016/j.electacta.2011.01.009
---------- CHICAGO ----------
Desimone, M.P., Grundmeier, G., Gordillo, G., Simison, S.N. "Amphiphilic amido-amine as an effective corrosion inhibitor for mild steel exposed to CO2 saturated solution: Polarization, EIS and PM-IRRAS studies" . Electrochimica Acta 56, no. 8 (2011) : 2990-2998.
http://dx.doi.org/10.1016/j.electacta.2011.01.009
---------- MLA ----------
Desimone, M.P., Grundmeier, G., Gordillo, G., Simison, S.N. "Amphiphilic amido-amine as an effective corrosion inhibitor for mild steel exposed to CO2 saturated solution: Polarization, EIS and PM-IRRAS studies" . Electrochimica Acta, vol. 56, no. 8, 2011, pp. 2990-2998.
http://dx.doi.org/10.1016/j.electacta.2011.01.009
---------- VANCOUVER ----------
Desimone, M.P., Grundmeier, G., Gordillo, G., Simison, S.N. Amphiphilic amido-amine as an effective corrosion inhibitor for mild steel exposed to CO2 saturated solution: Polarization, EIS and PM-IRRAS studies. Electrochim Acta. 2011;56(8):2990-2998.
http://dx.doi.org/10.1016/j.electacta.2011.01.009