Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy

Detalhes bibliográficos
Autor(a) principal: Regone, Natal Nerímio
Data de Publicação: 2004
Outros Autores: Freire, Célia Marina Alvarenga, Ballester, Margarita, Rangel, Elidiane C. [UNESP], Cruz, Nilson C. [UNESP]
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/232100
Resumo: Al-Cu alloy is largely employed in mechanical and aircraft industries. Usually aluminum and aluminum alloys are submitted to an electrochemical process called anodizing that consists on growing an oxide film on their surface. The oxide film protects metallic substrate because it has higher hardness and corrosion resistance, but in the case of alloys the anodizing process using direct current becomes difficult due to the presence of alloying elements. The aim of the present work was to develop a procedure to anodize Al-Cu alloy using pulsed current. The electrochemical properties were analyzed by electrochemical impedance spectroscopy (EIS) in a 0.5 M NaCl solution. Information about the structure of the formed anodic oxide was obtained using an equivalent circuit described in literature and Boukamp fitting procedure. Interpretation of EIS results showed that films grown using pulsed current, when compared to similar oxide films produced using direct current, have better corrosion protective properties. The superior properties of the samples prepared by pulsed current were also observed through their hardness results. Such data were obtained by nanoindentation technique, in a Hysitron Triboindenter system. This equipment allows determination of mechanical and tribological properties of materials in the nanoscale range.
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spelling Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloyAnodizingElectrochemical impedance spectroscopyHardnessPulsed currentAl-Cu alloy is largely employed in mechanical and aircraft industries. Usually aluminum and aluminum alloys are submitted to an electrochemical process called anodizing that consists on growing an oxide film on their surface. The oxide film protects metallic substrate because it has higher hardness and corrosion resistance, but in the case of alloys the anodizing process using direct current becomes difficult due to the presence of alloying elements. The aim of the present work was to develop a procedure to anodize Al-Cu alloy using pulsed current. The electrochemical properties were analyzed by electrochemical impedance spectroscopy (EIS) in a 0.5 M NaCl solution. Information about the structure of the formed anodic oxide was obtained using an equivalent circuit described in literature and Boukamp fitting procedure. Interpretation of EIS results showed that films grown using pulsed current, when compared to similar oxide films produced using direct current, have better corrosion protective properties. The superior properties of the samples prepared by pulsed current were also observed through their hardness results. Such data were obtained by nanoindentation technique, in a Hysitron Triboindenter system. This equipment allows determination of mechanical and tribological properties of materials in the nanoscale range.UNICAMP-Faculdade de Engenharia Mecânica DEMA C.P.6122 Rua Mendeleiv 200 - Cidade Universitária Zeferino Vaz, Barão Geraldo Cep, 13083-970 Campinas-SPUNESP - Unidade Diferenciada Sorocaba/Iperó Grupo de Plasmas Tecnológicos, Av. Três de Março, 18087-180, Sorocaba, SPUNESP - Unidade Diferenciada Sorocaba/Iperó Grupo de Plasmas Tecnológicos, Av. Três de Março, 18087-180, Sorocaba, SPUniversidade Estadual de Campinas (UNICAMP)Universidade Estadual Paulista (UNESP)Regone, Natal NerímioFreire, Célia Marina AlvarengaBallester, MargaritaRangel, Elidiane C. [UNESP]Cruz, Nilson C. [UNESP]2022-04-29T08:48:59Z2022-04-29T08:48:59Z2004-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectEUROCORR 2004 - European Corrosion Conference: Long Term Prediction and Modelling of Corrosion.http://hdl.handle.net/11449/2321002-s2.0-84867261156Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEUROCORR 2004 - European Corrosion Conference: Long Term Prediction and Modelling of Corrosioninfo:eu-repo/semantics/openAccess2022-04-29T08:48:59Zoai:repositorio.unesp.br:11449/232100Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:10:09.573584Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
title Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
spellingShingle Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
Regone, Natal Nerímio
Anodizing
Electrochemical impedance spectroscopy
Hardness
Pulsed current
title_short Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
title_full Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
title_fullStr Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
title_full_unstemmed Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
title_sort Electrochemical properties and nano-hardness of anodic oxide film grown over Al-Cu alloy
author Regone, Natal Nerímio
author_facet Regone, Natal Nerímio
Freire, Célia Marina Alvarenga
Ballester, Margarita
Rangel, Elidiane C. [UNESP]
Cruz, Nilson C. [UNESP]
author_role author
author2 Freire, Célia Marina Alvarenga
Ballester, Margarita
Rangel, Elidiane C. [UNESP]
Cruz, Nilson C. [UNESP]
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual de Campinas (UNICAMP)
Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Regone, Natal Nerímio
Freire, Célia Marina Alvarenga
Ballester, Margarita
Rangel, Elidiane C. [UNESP]
Cruz, Nilson C. [UNESP]
dc.subject.por.fl_str_mv Anodizing
Electrochemical impedance spectroscopy
Hardness
Pulsed current
topic Anodizing
Electrochemical impedance spectroscopy
Hardness
Pulsed current
description Al-Cu alloy is largely employed in mechanical and aircraft industries. Usually aluminum and aluminum alloys are submitted to an electrochemical process called anodizing that consists on growing an oxide film on their surface. The oxide film protects metallic substrate because it has higher hardness and corrosion resistance, but in the case of alloys the anodizing process using direct current becomes difficult due to the presence of alloying elements. The aim of the present work was to develop a procedure to anodize Al-Cu alloy using pulsed current. The electrochemical properties were analyzed by electrochemical impedance spectroscopy (EIS) in a 0.5 M NaCl solution. Information about the structure of the formed anodic oxide was obtained using an equivalent circuit described in literature and Boukamp fitting procedure. Interpretation of EIS results showed that films grown using pulsed current, when compared to similar oxide films produced using direct current, have better corrosion protective properties. The superior properties of the samples prepared by pulsed current were also observed through their hardness results. Such data were obtained by nanoindentation technique, in a Hysitron Triboindenter system. This equipment allows determination of mechanical and tribological properties of materials in the nanoscale range.
publishDate 2004
dc.date.none.fl_str_mv 2004-12-01
2022-04-29T08:48:59Z
2022-04-29T08:48:59Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv EUROCORR 2004 - European Corrosion Conference: Long Term Prediction and Modelling of Corrosion.
http://hdl.handle.net/11449/232100
2-s2.0-84867261156
identifier_str_mv EUROCORR 2004 - European Corrosion Conference: Long Term Prediction and Modelling of Corrosion.
2-s2.0-84867261156
url http://hdl.handle.net/11449/232100
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv EUROCORR 2004 - European Corrosion Conference: Long Term Prediction and Modelling of Corrosion
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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