EIS investigation of a Ce‐based posttreatment step on the corrosion behaviour of Alclad AA2024 anodized in TSA

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dc.contributor.authorRAMIREZ, OSCAR M.P.pt_BR
dc.contributor.authorQUEIROZ, FERNANDA M.pt_BR
dc.contributor.authorTERADA, MAYSApt_BR
dc.contributor.authorDONATUS, UYIMEpt_BR
dc.contributor.authorCOSTA, ISOLDApt_BR
dc.contributor.authorOLIVIER, MARIE-GEORGESpt_BR
dc.contributor.authorMELO, HERCILIO G. dept_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2019-11-22T12:42:51Z
dc.date.available2019-11-22T12:42:51Z
dc.date.issued2019pt_BR
dc.description.abstractIn the aircraft industry, anodizing and posttreatment steps use Cr (VI) compounds, which, despite offering good corrosion resistance and self‐healing properties, are highly toxic and carcinogenic. Ce compounds are recognized as efficient corrosion inhibitors for Al alloys, and several works report self‐healing ability for these chemicals. In this investigation, the corrosion resistance of Alclad AA2024‐T3 alloy anodized in tartaric‐sulphuric acid (TSA) bath and posttreated in a solution comprising cerium nitrate without and with hydrogen peroxide was evaluated. The purpose is to investigate the potentiality of using hydrothermal treatment in Ce nitrate solution as candidate to replace Cr (VI) posttreatment. The aim is to provide a posttreatment step which, while improving the corrosion resistance, does not plug the mouths of the pores maintaining the adhesion properties of the porous anodic layer. Microstructural characterization was carried out by SEM‐EDS whereas corrosion resistance was evaluated by EIS. The surface analysis showed that the posttreatments, all performed at 50°C, kept the open structure of the pores. EIS analysis showed that the posttreatments performed in the H2O2 solution for short immersion times were the most effective in improving the corrosion resistance of the samples, whereas electrical equivalent circuit (EEC) fitting of the data indicated sealing of the porous layer during the immersion of the different samples in the test solution. SEM‐EDS analysis of the samples posttreated in the H2O2 containing solution, prior and after the corrosion test, showed the presence of Ce oxy‐hydroxide randomly deposited on the sample surface, indicating that Ce could be incorporated/stored in the anodic layer.pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipIDCNPq: 168625/2017‐2; 400895/2014‐5pt_BR
dc.description.sponsorshipIDFAPESP: 18/01096‐5; 13/13235‐6pt_BR
dc.format.extent1260-1275pt_BR
dc.identifier.citationRAMIREZ, OSCAR M.P.; QUEIROZ, FERNANDA M.; TERADA, MAYSA; DONATUS, UYIME; COSTA, ISOLDA; OLIVIER, MARIE-GEORGES; MELO, HERCILIO G. de. EIS investigation of a Ce‐based posttreatment step on the corrosion behaviour of Alclad AA2024 anodized in TSA. <b>Surface and Interface Analysis</b>, v. 51, n. 12, p. 1260-1275, 2019. SI. DOI: <a href="https://dx.doi.org/10.1002/sia.6633">10.1002/sia.6633</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/30321.
dc.identifier.doi10.1002/sia.6633pt_BR
dc.identifier.fasciculo12pt_BR
dc.identifier.issn0142-2421pt_BR
dc.identifier.orcid0000-0002-4987-3334pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4987-3334
dc.identifier.percentilfi22.956pt_BR
dc.identifier.percentilfiCiteScore52.00
dc.identifier.suplementoSIpt_BR
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/30321
dc.identifier.vol51pt_BR
dc.relation.ispartofSurface and Interface Analysispt_BR
dc.rightsclosedAccesspt_BR
dc.sourceSymposium of Aluminium Surface Science and Technology, 8th, May 27-31, 2018, Helsingor, Denmarkpt_BR
dc.subjectaluminium alloys
dc.subjectanodization
dc.subjectcerium nitrates
dc.subjectequivalent circuits
dc.subjectimpedance
dc.subjectspectroscopy
dc.subjectelectrochemical cells
dc.subjectcorrosion resistance
dc.subjecttartaric acid
dc.subjectsulfuric acid
dc.titleEIS investigation of a Ce‐based posttreatment step on the corrosion behaviour of Alclad AA2024 anodized in TSApt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorUYIME DONATUS
ipen.autorISOLDA COSTA
ipen.codigoautor14732
ipen.codigoautor429
ipen.contributor.ipenauthorUYIME DONATUS
ipen.contributor.ipenauthorISOLDA COSTA
ipen.date.recebimento19-11
ipen.identifier.fi1.665pt_BR
ipen.identifier.fiCiteScore2.7
ipen.identifier.ipendoc25862pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi1.500 - 2.999
ipen.range.percentilfi0.00 - 24.99
ipen.type.genreArtigo
relation.isAuthorOfPublication4628322b-9afe-4cb7-bc70-0d33f8c96972
relation.isAuthorOfPublication952cc9fe-41a5-443f-b21a-316edc344ec8
relation.isAuthorOfPublication.latestForDiscovery4628322b-9afe-4cb7-bc70-0d33f8c96972
sigepi.autor.atividadeCOSTA, ISOLDA:429:730:Npt_BR
sigepi.autor.atividadeDONATUS, UYIME:14732:730:Npt_BR
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