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Enhancing the corrosion protection of AA2024-T3 alloy by surface treatments based on Piperazine-modified hybrid sol-gel films

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dc.affiliation.dptoUC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Químicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Tecnología de Polvoses
dc.contributor.authorCarbonell Boix, Diogenes Josées
dc.contributor.authorMontoya, Rodrigoes
dc.contributor.authorGelling, Victoria J.
dc.contributor.authorGalván Sierra, Juan Carlos
dc.contributor.authorJiménez Morales, Antonia
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.contributor.funderComunidad de Madrides
dc.date.accessioned2021-06-04T10:59:29Z
dc.date.available2021-06-04T10:59:29Z
dc.date.issued2020-01-01
dc.description.abstractThe aim of this study was to develop new chrome-free surface pretreatments for AA2024-T3 aluminum alloy. These pretreatments were based on hybrid organic-inorganic sol-gel thin films prepared from mixtures of The aim of this study was to develop new chrome-free surface pretreatments for AA2024-T3 aluminum alloy. These pretreatments were based on hybrid organic–inorganic sol–gel thin films prepared from mixtures of γ -methacryloxypropyltrimethoxysilane (MAPTMS) and tetramethylorthosilicate (TMOS). Di erent MAPTMS/TMOS molar ratios were used for optimizing the physical–chemical characteristics of the sol–gel films. The formulation of a set of these sols was modified by incorporating piperazine (1,4-diazacyclohexane) as a corrosion inhibitor. The resulting sol–gel films were characterized by using Fourier transform infrared spectroscopy (FTIR), liquid-state 29Si nuclear magnetic resonance spectroscopy (29Si-NMR) and viscosity measurements. The corrosion performance of the sol–gel films was analyzed by using electrochemical impedance spectroscopy (EIS) and local electrochemical impedance mapping (LEIM). The characterization techniques indicated that piperazine behaved as a catalyst for the condensation reaction during the formation of the MAPTMS/TMOS organopolysiloxane network and produces an increase of the crosslinking degree of the sol–gel films. EIS and LEIM results showed that piperazine is an e ective corrosion inhibitor, which can be used to enhance the active corrosion protection performance of sol–gel films.-methacryloxypropyltrimethoxysilane (MAPTMS) and tetramethylorthosilicate (TMOS). Di erent MAPTMS/TMOS molar ratios were used for optimizing the physical-chemical characteristics of the sol-gel films. The formulation of a set of these sols was modified by incorporating piperazine (1,4- diazacyclohexane) as a corrosion inhibitor. The resulting sol-gel films were characterized by using Fourier transform infrared spectroscopy (FTIR), liquid-state 29Si nuclear magnetic resonance spectroscopy (29Si-NMR) and viscosity measurements. The corrosion performance of the sol-gel films was analyzed by using electrochemical impedance spectroscopy (EIS) and local electrochemical impedance mapping (LEIM). The characterization techniques indicated that piperazine behaved as a catalyst for the condensation reaction during the formation of the MAPTMS/TMOS organopolysiloxane network and produces an increase of the crosslinking degree of the sol-gel films. EIS and LEIM results showed that piperazine is an e ective corrosion inhibitor, which can be used to enhance the active corrosion protection performance of sol-gel films.en
dc.description.sponsorshipThis research was funded by the Ministry of Economy and Competitiveness of Spain (MAT2015-65445-C2-1-R and MAT2015-70780-C4-2-P Projects), and the Regional Government of Madrid (Project P2018/NMT-4411 ADITIMAT-CM).
dc.format.extent27
dc.identifier.bibliographicCitationCarbonell, D. J., Montoya, R., Gelling, V. J., Galván, J. C., & Jiménez-Morales, A. (2020). Enhancing the Corrosion Protection of AA2024-T3 Alloy by Surface Treatments Based on Piperazine-Modified Hybrid Sol–Gel Films. Metals, 10(4), 539.
dc.identifier.doihttps://doi.org/10.3390/met10040539
dc.identifier.issn2075-4701
dc.identifier.publicationfirstpage539
dc.identifier.publicationissue4
dc.identifier.publicationtitleMetals
dc.identifier.publicationvolume10
dc.identifier.urihttps://hdl.handle.net/10016/32831
dc.identifier.uxxiAR/0000025671
dc.language.isoeng
dc.publisherMDPI
dc.relation.projectIDGobierno de España. MAT2015-65445-C2-1-R
dc.relation.projectIDGobierno de España. MAT2015-70780-C4-2-P
dc.relation.projectIDComunidad de Madrid. P2018/NMT-4411 (ADITIMAT-CM)
dc.rights© 2020 by the authors
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/
dc.subject.ecienciaMaterialeses
dc.subject.otherAa2024-T3 aluminum alloysen
dc.subject.otherActive corrosion protectionen
dc.subject.otherCorrosion inhibitorsen
dc.subject.otherElectrochemical impedance spectroscopyen
dc.subject.otherHybrid sol-gel filmsen
dc.subject.otherLocal electrochemical impedance mappingen
dc.subject.otherPiperazineen
dc.titleEnhancing the corrosion protection of AA2024-T3 alloy by surface treatments based on Piperazine-modified hybrid sol-gel filmsen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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