Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000200011 |
Resumo: | In this investigation the corrosion resistance of four Al-Si hypereutectic alloys in a solution typical of condensate from automotive fuel combustion products, and referred to here as synthetic condensed automotive solution, has been studied. Three commercial alloys that are used for cylinder liners, and a laboratory made alloy, were studied by electrochemical impedance spectroscopy and measurements were taken after increasing times of immersion in this solution. Comparison of the electrochemical response of the four alloys in the corrosive solution was carried out. Although the mechanisms by which the four alloys corroded were similar, the results indicated differences in corrosion resistances of these alloys, and these differences could be related to their microstructures. The laboratory prepared alloy showed increased susceptibility to pitting corrosion compared to the commercial alloys. The surfaces of the alloys were examined, before and after the corrosion test, by scanning electron microscopy and analyzed by energy dispersive spectroscopy. The results indicated preferential attack of the aluminium matrix phase in all the alloys. The alloy with higher copper content and prepared by spray forming was more susceptible to pitting compared to the other alloys. The EIS response at low frequencies indicated a diffusion-controlled process, probably that of oxygen to the alloy interface. |
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Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solutionAl-Si hypereutectic alloyscylinder linerselectrochemical impedance spectroscopycorrosion behaviorIn this investigation the corrosion resistance of four Al-Si hypereutectic alloys in a solution typical of condensate from automotive fuel combustion products, and referred to here as synthetic condensed automotive solution, has been studied. Three commercial alloys that are used for cylinder liners, and a laboratory made alloy, were studied by electrochemical impedance spectroscopy and measurements were taken after increasing times of immersion in this solution. Comparison of the electrochemical response of the four alloys in the corrosive solution was carried out. Although the mechanisms by which the four alloys corroded were similar, the results indicated differences in corrosion resistances of these alloys, and these differences could be related to their microstructures. The laboratory prepared alloy showed increased susceptibility to pitting corrosion compared to the commercial alloys. The surfaces of the alloys were examined, before and after the corrosion test, by scanning electron microscopy and analyzed by energy dispersive spectroscopy. The results indicated preferential attack of the aluminium matrix phase in all the alloys. The alloy with higher copper content and prepared by spray forming was more susceptible to pitting compared to the other alloys. The EIS response at low frequencies indicated a diffusion-controlled process, probably that of oxygen to the alloy interface.ABM, ABC, ABPol2005-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000200011Materials Research v.8 n.2 2005reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392005000200011info:eu-repo/semantics/openAccessSantos,Hamilta de OliveiraReis,Fernando Morais dosKunioshi,Clarice TeruiRossi,Jesualdo LuizCosta,Isoldaeng2006-02-06T00:00:00Zoai:scielo:S1516-14392005000200011Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-02-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
title |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
spellingShingle |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution Santos,Hamilta de Oliveira Al-Si hypereutectic alloys cylinder liners electrochemical impedance spectroscopy corrosion behavior |
title_short |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
title_full |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
title_fullStr |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
title_full_unstemmed |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
title_sort |
Corrosion performance of Al-Si-Cu hypereutectic alloys in a synthetic condensed automotive solution |
author |
Santos,Hamilta de Oliveira |
author_facet |
Santos,Hamilta de Oliveira Reis,Fernando Morais dos Kunioshi,Clarice Terui Rossi,Jesualdo Luiz Costa,Isolda |
author_role |
author |
author2 |
Reis,Fernando Morais dos Kunioshi,Clarice Terui Rossi,Jesualdo Luiz Costa,Isolda |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Santos,Hamilta de Oliveira Reis,Fernando Morais dos Kunioshi,Clarice Terui Rossi,Jesualdo Luiz Costa,Isolda |
dc.subject.por.fl_str_mv |
Al-Si hypereutectic alloys cylinder liners electrochemical impedance spectroscopy corrosion behavior |
topic |
Al-Si hypereutectic alloys cylinder liners electrochemical impedance spectroscopy corrosion behavior |
description |
In this investigation the corrosion resistance of four Al-Si hypereutectic alloys in a solution typical of condensate from automotive fuel combustion products, and referred to here as synthetic condensed automotive solution, has been studied. Three commercial alloys that are used for cylinder liners, and a laboratory made alloy, were studied by electrochemical impedance spectroscopy and measurements were taken after increasing times of immersion in this solution. Comparison of the electrochemical response of the four alloys in the corrosive solution was carried out. Although the mechanisms by which the four alloys corroded were similar, the results indicated differences in corrosion resistances of these alloys, and these differences could be related to their microstructures. The laboratory prepared alloy showed increased susceptibility to pitting corrosion compared to the commercial alloys. The surfaces of the alloys were examined, before and after the corrosion test, by scanning electron microscopy and analyzed by energy dispersive spectroscopy. The results indicated preferential attack of the aluminium matrix phase in all the alloys. The alloy with higher copper content and prepared by spray forming was more susceptible to pitting compared to the other alloys. The EIS response at low frequencies indicated a diffusion-controlled process, probably that of oxygen to the alloy interface. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000200011 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000200011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392005000200011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.8 n.2 2005 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212658071994368 |