Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR

The effect of the galvanic corrosion process taking place between aluminium alloy (AA2024-T3) and carbon fiber reinforced plastic (CFRP) immersed in 0.05 M NaCl was studied using organic and inorganic compounds as corrosion inhibitors. Electrochemical approaches such as electrochemical noise analys...

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Autores principales:	Roy López-Sesenes, Jose Gonzalo González-Rodríguez, José Gerardo Vera-Dimas, Rene Guardian-Tapia, Luis Cisneros-Villalobos
Formato:	article
Lenguaje:	EN
Publicado:	International Association of Physical Chemists (IAPC) 2021
Materias:	Electrochemical methods rare hearths adsorption isotherm Gibbs free energy synergistic effect power spectral density Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/7546560fb19b4f2b8c7064e36371ae3b
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spelling	oai:doaj.org-article:7546560fb19b4f2b8c7064e36371ae3b2021-11-14T10:02:37ZOrganic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR10.5599/jese.11261847-9286https://doaj.org/article/7546560fb19b4f2b8c7064e36371ae3b2021-11-01T00:00:00Zhttps://pub.iapchem.org/ojs/index.php/JESE/article/view/1126https://doaj.org/toc/1847-9286 The effect of the galvanic corrosion process taking place between aluminium alloy (AA2024-T3) and carbon fiber reinforced plastic (CFRP) immersed in 0.05 M NaCl was studied using organic and inorganic compounds as corrosion inhibitors. Electrochemical approaches such as electrochemical noise analysis (ENA) and electrochemical impedance spectroscopy (EIS) were carried out to evaluate efficiencies of 1,2,4-triazole (C2H3N3) and cerium nitrate hexahydrate (Ce(NO3)3·6H2O) as corrosion inhibitors. The highest efficiency was reached for Ce(NO3)3.6H2O, with some improvement observed by adding C2H3N3 in a mixed inhibitor solution. The noise resistance (Rn) and polarization resistance (Rp) values calculated from ENA and EIS data showed almost identical behavior with different magnitudes but similar trends. Adsorption isotherm models estimated with fractional surface coverage (q) parameter were fitted better to Langmuir model for C2H3N3 and Temkin model for Ce(NO3)3·6H2O. The calculated values of Gibbs free energy suggested physisorption and chemisorption as spontaneous interactions between a metal surface and both inhibitors. Energy-dispersive X-ray spectroscopy (EDS) was carried out before and after immersing AA2024-T3 in the electrolyte, identifying rich zones in copper with cerium deposited over it and confirming the presence of rare-earth oxide deposition and oxide film products. The EDS analysis for CFRP revealed the deposition of Ce and Al particles over its surface after immersion in the electrolyte, especially in the areas rich in carbon. Roy López-SesenesJose Gonzalo González-RodríguezJosé Gerardo Vera-DimasRene Guardian-TapiaLuis Cisneros-VillalobosInternational Association of Physical Chemists (IAPC)articleElectrochemical methodsrare hearthsadsorption isothermGibbs free energysynergistic effectpower spectral densityChemistryQD1-999ENJournal of Electrochemical Science and Engineering, Vol 11, Iss 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electrochemical methods rare hearths adsorption isotherm Gibbs free energy synergistic effect power spectral density Chemistry QD1-999
spellingShingle	Electrochemical methods rare hearths adsorption isotherm Gibbs free energy synergistic effect power spectral density Chemistry QD1-999 Roy López-Sesenes Jose Gonzalo González-Rodríguez José Gerardo Vera-Dimas Rene Guardian-Tapia Luis Cisneros-Villalobos Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR
description	The effect of the galvanic corrosion process taking place between aluminium alloy (AA2024-T3) and carbon fiber reinforced plastic (CFRP) immersed in 0.05 M NaCl was studied using organic and inorganic compounds as corrosion inhibitors. Electrochemical approaches such as electrochemical noise analysis (ENA) and electrochemical impedance spectroscopy (EIS) were carried out to evaluate efficiencies of 1,2,4-triazole (C2H3N3) and cerium nitrate hexahydrate (Ce(NO3)3·6H2O) as corrosion inhibitors. The highest efficiency was reached for Ce(NO3)3.6H2O, with some improvement observed by adding C2H3N3 in a mixed inhibitor solution. The noise resistance (Rn) and polarization resistance (Rp) values calculated from ENA and EIS data showed almost identical behavior with different magnitudes but similar trends. Adsorption isotherm models estimated with fractional surface coverage (q) parameter were fitted better to Langmuir model for C2H3N3 and Temkin model for Ce(NO3)3·6H2O. The calculated values of Gibbs free energy suggested physisorption and chemisorption as spontaneous interactions between a metal surface and both inhibitors. Energy-dispersive X-ray spectroscopy (EDS) was carried out before and after immersing AA2024-T3 in the electrolyte, identifying rich zones in copper with cerium deposited over it and confirming the presence of rare-earth oxide deposition and oxide film products. The EDS analysis for CFRP revealed the deposition of Ce and Al particles over its surface after immersion in the electrolyte, especially in the areas rich in carbon.
format	article
author	Roy López-Sesenes Jose Gonzalo González-Rodríguez José Gerardo Vera-Dimas Rene Guardian-Tapia Luis Cisneros-Villalobos
author_facet	Roy López-Sesenes Jose Gonzalo González-Rodríguez José Gerardo Vera-Dimas Rene Guardian-Tapia Luis Cisneros-Villalobos
author_sort	Roy López-Sesenes
title	Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR
title_short	Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR
title_full	Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR
title_fullStr	Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR
title_full_unstemmed	Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR
title_sort	organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure aa2024-cfpr
publisher	International Association of Physical Chemists (IAPC)
publishDate	2021
url	https://doaj.org/article/7546560fb19b4f2b8c7064e36371ae3b
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Organic and inorganic compounds as corrosion inhibitors to reduce galvanic effect for the hybrid structure AA2024-CFPR

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