On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy
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Publication Date: | 2017 |
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Download full: | http://repositorio.ipen.br/handle/123456789/27318 |
Summary: | The effect of hydrothermal treatment time on the sealing and corrosion resistance of the anodized AA7475-T761 aluminium alloy has been investigated in this study. The treatments tested are environmental compatible and has not chromium ions involved. Anodizing was carried out by tartaric-sulphuric anodizing (TSA) and this was followed by hydrothermal treatments for partial sealing, either with or without propyleneglycol (PRG) and/or cerium ions. Four different treatment times were tested, specifically, 2.5, 5.0, 7.5 and 10 min. The corrosion resistance of the treated samples was evaluated by Electrochemical Impedance Spectroscopy (EIS) and the anodic layers formed by anodizing and hydrothermal treatments were characterized by Scanning Electron Microscopy (SEM). The EIS results indicated that the best corrosion resistance was related to the treatments that combined hydrothermal treatments in boiling water with PRG for 10 minutes or boiling water with PRG and cerium ions for 5 min. The SEM images for the samples showed the formation of a homogeneous anodic layer and the thickness is approximately 3 ???m. It was noticed that the porosities were not completed sealed by the treatments tested and this was on purpose in order to allow coating adhesion to the anodic layer. |
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2017-03-24T15:59:11Z2017-03-24T15:59:11ZSeptember 21-23, 2016http://repositorio.ipen.br/handle/123456789/27318The effect of hydrothermal treatment time on the sealing and corrosion resistance of the anodized AA7475-T761 aluminium alloy has been investigated in this study. The treatments tested are environmental compatible and has not chromium ions involved. Anodizing was carried out by tartaric-sulphuric anodizing (TSA) and this was followed by hydrothermal treatments for partial sealing, either with or without propyleneglycol (PRG) and/or cerium ions. Four different treatment times were tested, specifically, 2.5, 5.0, 7.5 and 10 min. The corrosion resistance of the treated samples was evaluated by Electrochemical Impedance Spectroscopy (EIS) and the anodic layers formed by anodizing and hydrothermal treatments were characterized by Scanning Electron Microscopy (SEM). The EIS results indicated that the best corrosion resistance was related to the treatments that combined hydrothermal treatments in boiling water with PRG for 10 minutes or boiling water with PRG and cerium ions for 5 min. The SEM images for the samples showed the formation of a homogeneous anodic layer and the thickness is approximately 3 ???m. It was noticed that the porosities were not completed sealed by the treatments tested and this was on purpose in order to allow coating adhesion to the anodic layer.Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2017-03-24T15:59:11Z No. of bitstreams: 1 23662.pdf: 861816 bytes, checksum: 2b2d7401e249a3f588382e1c5d8cdd38 (MD5)Made available in DSpace on 2017-03-24T15:59:11Z (GMT). No. of bitstreams: 1 23662.pdf: 861816 bytes, checksum: 2b2d7401e249a3f588382e1c5d8cdd38 (MD5)aluminium alloyshydrothermal synthesiscorrosioncorrosion resistanceanodizationelectrochemistryimpedancespectroscopyceriumsealing materialsOn the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectINALCOINaples, ItalyALMEIDA, THALLIS L.QUEIROZ, FERNANDA M.TERADA, MAYSACOSTA, ISOLDACAPELOSSI, VERA R.INTERNATIONAL ALUMINIUM CONFERENCE, 13thinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional do IPENinstname:Instituto de Pesquisas Energéticas e Nucleares (IPEN)instacron:IPEN236622016QUEIROZ, FERNANDA M.COSTA, ISOLDA17-03Proceedings2876429QUEIROZ, FERNANDA M.:2876:730:NCOSTA, ISOLDA:429:730:NORIGINAL23662.pdf23662.pdfapplication/pdf861816http://repositorio.ipen.br/bitstream/123456789/27318/1/23662.pdf2b2d7401e249a3f588382e1c5d8cdd38MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://repositorio.ipen.br/bitstream/123456789/27318/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52123456789/273182020-10-11 00:38:10.787oai:repositorio.ipen.br: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Repositório InstitucionalPUBhttp://repositorio.ipen.br/oai/requestbibl@ipen.bropendoar:45102020-10-11T00:38:10Repositório Institucional do IPEN - Instituto de Pesquisas Energéticas e Nucleares (IPEN)false |
dc.title.pt_BR.fl_str_mv |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
title |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
spellingShingle |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy ALMEIDA, THALLIS L. aluminium alloys hydrothermal synthesis corrosion corrosion resistance anodization electrochemistry impedance spectroscopy cerium sealing materials |
title_short |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
title_full |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
title_fullStr |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
title_full_unstemmed |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
title_sort |
On the effects of hydrothermal treatments on the corrosion resistance of the TSA anodized AA7475-T761 alloy |
author |
ALMEIDA, THALLIS L. |
author_facet |
ALMEIDA, THALLIS L. QUEIROZ, FERNANDA M. TERADA, MAYSA COSTA, ISOLDA CAPELOSSI, VERA R. INTERNATIONAL ALUMINIUM CONFERENCE, 13th |
author_role |
author |
author2 |
QUEIROZ, FERNANDA M. TERADA, MAYSA COSTA, ISOLDA CAPELOSSI, VERA R. INTERNATIONAL ALUMINIUM CONFERENCE, 13th |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
ALMEIDA, THALLIS L. QUEIROZ, FERNANDA M. TERADA, MAYSA COSTA, ISOLDA CAPELOSSI, VERA R. INTERNATIONAL ALUMINIUM CONFERENCE, 13th |
dc.subject.por.fl_str_mv |
aluminium alloys hydrothermal synthesis corrosion corrosion resistance anodization electrochemistry impedance spectroscopy cerium sealing materials |
topic |
aluminium alloys hydrothermal synthesis corrosion corrosion resistance anodization electrochemistry impedance spectroscopy cerium sealing materials |
description |
The effect of hydrothermal treatment time on the sealing and corrosion resistance of the anodized AA7475-T761 aluminium alloy has been investigated in this study. The treatments tested are environmental compatible and has not chromium ions involved. Anodizing was carried out by tartaric-sulphuric anodizing (TSA) and this was followed by hydrothermal treatments for partial sealing, either with or without propyleneglycol (PRG) and/or cerium ions. Four different treatment times were tested, specifically, 2.5, 5.0, 7.5 and 10 min. The corrosion resistance of the treated samples was evaluated by Electrochemical Impedance Spectroscopy (EIS) and the anodic layers formed by anodizing and hydrothermal treatments were characterized by Scanning Electron Microscopy (SEM). The EIS results indicated that the best corrosion resistance was related to the treatments that combined hydrothermal treatments in boiling water with PRG for 10 minutes or boiling water with PRG and cerium ions for 5 min. The SEM images for the samples showed the formation of a homogeneous anodic layer and the thickness is approximately 3 ???m. It was noticed that the porosities were not completed sealed by the treatments tested and this was on purpose in order to allow coating adhesion to the anodic layer. |
publishDate |
2017 |
dc.date.evento.pt_BR.fl_str_mv |
September 21-23, 2016 |
dc.date.accessioned.fl_str_mv |
2017-03-24T15:59:11Z |
dc.date.available.fl_str_mv |
2017-03-24T15:59:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ipen.br/handle/123456789/27318 |
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http://repositorio.ipen.br/handle/123456789/27318 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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I |
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