Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024

Supplementary material associated with this article can be found, in the online version, at doi:10.1016/j.apsadv.2023.100479.

Detalles Bibliográficos
Autores: Trentin, A., Samiee, R., Pakseresht, A.H., Durán, Alicia, Castro Martín, Yolanda, Galusek, D.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/347942
Acceso en línea:http://hdl.handle.net/10261/347942
Access Level:acceso abierto
Palabra clave:Epoxy coatings
DGEBA
Steel
Aluminum
Sol-gel
Bonding mechanisms
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spelling Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024Trentin, A.Samiee, R.Pakseresht, A.H.Durán, AliciaCastro Martín, YolandaGalusek, D.Epoxy coatingsDGEBASteelAluminumSol-gelBonding mechanismsSupplementary material associated with this article can be found, in the online version, at doi:10.1016/j.apsadv.2023.100479.[EN] In this work five independent pre-treatments – mechanical polishing, alkaline and acid etching, sol-gel primer, and anodizing – were applied on mild steel and aluminum (AA7075 and AA2024) substrates before the deposition of epoxy coatings. The results demonstrate that efficient adhesion can be achieved by simple methodologies and widely available chemicals as an alternative to toxic conversion layers or highly energetic processes. All the treatments provided higher adhesion (up to 75%, 61% and 14% on AA7075, AA2024 and steel, respectively) and better anti-corrosion performance (increase of impedance values at low frequency up to four orders of magnitude) than the polished reference. The anodizing of aluminum alloys yielded good anti-corrosion performance, but slightly lower mechanical properties compared to sol-gel primer and alkaline etching. The hydroxyls density was found to play a major role in strong adhesion prevailing over surface roughness, contact area, oxide thickness and hydrophobicity. Despite the efficient performance of hydrogen bonds from acid and alkaline etching on aluminum, these connections do not yield sufficiently stable bonds that make an impermeable barrier of epoxy coatings on steel. Covalent bonds (Me-O-Si) represent the key to achieve a significant improvement in mechanical and chemical resistance against the ingress of water and polymer chain relaxation. This makes the sol-gel primer a simple, economical, and environmentally alternative towards efficient bonding at a molecular level.Financial support from the European Union´s Horizon 2020 Research and Innovation Programme under grant agreement No 739566, project FunGlass. Additionally, the funding obtained from VEGA 1/0171/21 and VEGA 1/0241/23 is acknowledged. This article is also part of the dissemination activities of MICINN project TED2021-131258B-I00.Peer reviewedElsevier BVEuropean CommissionMinisterio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/347942reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/739566info:eu-repo/grantAgreement/AEI//TED2021-131258B-I00https://doi.org/10.1016/j.apsadv.2023.100479Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3479422026-05-22T06:33:51Z
dc.title.none.fl_str_mv Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
title Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
spellingShingle Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
Trentin, A.
Epoxy coatings
DGEBA
Steel
Aluminum
Sol-gel
Bonding mechanisms
title_short Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
title_full Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
title_fullStr Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
title_full_unstemmed Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
title_sort Influence of pre-treatments on adhesion, barrier and mechanical properties of epoxy coatings: A comparison between steel, AA7075 and AA2024
dc.creator.none.fl_str_mv Trentin, A.
Samiee, R.
Pakseresht, A.H.
Durán, Alicia
Castro Martín, Yolanda
Galusek, D.
author Trentin, A.
author_facet Trentin, A.
Samiee, R.
Pakseresht, A.H.
Durán, Alicia
Castro Martín, Yolanda
Galusek, D.
author_role author
author2 Samiee, R.
Pakseresht, A.H.
Durán, Alicia
Castro Martín, Yolanda
Galusek, D.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Ciencia e Innovación (España)
Agencia Estatal de Investigación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Epoxy coatings
DGEBA
Steel
Aluminum
Sol-gel
Bonding mechanisms
topic Epoxy coatings
DGEBA
Steel
Aluminum
Sol-gel
Bonding mechanisms
description Supplementary material associated with this article can be found, in the online version, at doi:10.1016/j.apsadv.2023.100479.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/347942
url http://hdl.handle.net/10261/347942
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/739566
info:eu-repo/grantAgreement/AEI//TED2021-131258B-I00
https://doi.org/10.1016/j.apsadv.2023.100479
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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score 15.81155

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