LDH Post-Treatment of Flash PEO Coatings

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dc.contributor.authorOlmo, Rubén del
dc.contributor.authorMohedano Sánchez, Marta
dc.contributor.authorMingo, Beatriz
dc.contributor.authorArrabal Durán, Raúl
dc.contributor.authorMatykina, Endzhe
dc.date.accessioned2023-06-17T12:36:08Z
dc.date.available2023-06-17T12:36:08Z
dc.date.issued2019-05-30
dc.description.abstractThis work investigates environmentally friendly alternatives to toxic and carcinogenic Cr (VI)-based surface treatments for aluminium alloys. It is focused on multifunctional thin or flash plasma electrolytic oxidation (PEO)-layered double hydroxides (LDH) coatings. Three PEO coatings developed under a current-controlled mode based on aluminate, silicate and phosphate were selected from 31 processes (with different combinations of electrolytes, electrical conditions and time) according to corrosive behavior and energy consumption. In situ Zn-Al LDH was optimized in terms of chemical composition and exposure time on the bulk material, then applied to the selected PEO coatings. The structure, morphology and composition of PEO coatings with and without Zn-Al-LDH were characterized using XRD, SEM and EDS. Thicker and more porous PEO coatings revealed higher amounts of LDH flakes on their surfaces. The corrosive behavior of the coatings was studied by electrochemical impedance spectroscopy (EIS). The corrosion resistance was enhanced considerably after the PEO coatings formation in comparison with bulk material. Corrosion resistance was not affected after the LDH treatment, which can be considered as a first step in achieving active protection systems by posterior incorporation of green corrosion inhibitors.
dc.description.departmentDepto. de Ingeniería Química y de Materiales
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)/FEDER
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/66157
dc.identifier.doi10.3390/coatings9060354
dc.identifier.issn2079-6412
dc.identifier.officialurlhttps://doi.org/10.3390/coatings9060354
dc.identifier.relatedurlhttps://www.mdpi.com/2079-6412/9/6/354
dc.identifier.urihttps://hdl.handle.net/20.500.14352/12596
dc.issue.number6
dc.journal.titleCoatings
dc.language.isoeng
dc.page.initial354
dc.publisherMDPI
dc.relation.projectIDMAT2015-73355-JIN
dc.relation.projectIDRYC-2017-21843; RTI2018-096391-B-C33
dc.relation.projectIDADITIMAT-CM (S2018/NMT-4411)
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.keywordPEO
dc.subject.keywordLDH
dc.subject.keywordactive protection
dc.subject.keywordcorrosion
dc.subject.keywordaluminium
dc.subject.ucmMateriales
dc.subject.unesco3312 Tecnología de Materiales
dc.titleLDH Post-Treatment of Flash PEO Coatings
dc.typejournal article
dc.volume.number9
dspace.entity.typePublication
relation.isAuthorOfPublication160ef5bd-2d04-4f6c-b028-cb7ce4cf8d38
relation.isAuthorOfPublication6a953ac5-3b84-40fc-a995-2a00ac938151
relation.isAuthorOfPublication427b12dd-40e9-49e6-a8fe-d41e79a056ff
relation.isAuthorOfPublication.latestForDiscovery160ef5bd-2d04-4f6c-b028-cb7ce4cf8d38
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