Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity

Detalhes bibliográficos
Autor(a) principal: Lima,Hillane Mirelle Lopes Ferreira de
Data de Publicação: 2017
Outros Autores: Bastos,Ivan Napoleão, Araújo,Walney Silva, Martins,Marcelo
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=S1516-14392017000800775
Resumo: Heat treatment can modify the corrosion resistance of stainless steels. Thus, the corrosion behavior of ASTM A890/A 890M GR 5A super duplex stainless steels (SDSS) has been investigated in aqueous 60,000 ppm NaCl solution by several electrochemical tests. The specimens were aged for 2, 10, 50 and 100 hours at 475 ºC. Potentiodynamic polarization studies showed that, when the corrosion potential comes to the passivation state, a peak current is detected at about 400 mV vs. Ag/AgCl, with a strong influence on the film stability. The peak current value increased with the aging time; the highest peak value was for the sample aged for 100 h. Three potentials were chosen from the polarization curves in order to evaluate the sample/film/solution behavior and their changes over the passivation range. The results indicate that the passive film was degraded with the increase of the aging time. In addition, the results of the corrosion tests were compared with the evolution of the mechanical properties of the steels by the Vickers microhardness test.
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spelling Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel PassivitySuper duplex stainless steelspassivityagingheat treatmentHeat treatment can modify the corrosion resistance of stainless steels. Thus, the corrosion behavior of ASTM A890/A 890M GR 5A super duplex stainless steels (SDSS) has been investigated in aqueous 60,000 ppm NaCl solution by several electrochemical tests. The specimens were aged for 2, 10, 50 and 100 hours at 475 ºC. Potentiodynamic polarization studies showed that, when the corrosion potential comes to the passivation state, a peak current is detected at about 400 mV vs. Ag/AgCl, with a strong influence on the film stability. The peak current value increased with the aging time; the highest peak value was for the sample aged for 100 h. Three potentials were chosen from the polarization curves in order to evaluate the sample/film/solution behavior and their changes over the passivation range. The results indicate that the passive film was degraded with the increase of the aging time. In addition, the results of the corrosion tests were compared with the evolution of the mechanical properties of the steels by the Vickers microhardness test.ABM, ABC, ABPol2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800775Materials Research v.20 suppl.2 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-0865info:eu-repo/semantics/openAccessLima,Hillane Mirelle Lopes Ferreira deBastos,Ivan NapoleãoAraújo,Walney SilvaMartins,Marceloeng2018-04-12T00:00:00Zoai:scielo:S1516-14392017000800775Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-04-12T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
title Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
spellingShingle Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
Lima,Hillane Mirelle Lopes Ferreira de
Super duplex stainless steels
passivity
aging
heat treatment
title_short Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
title_full Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
title_fullStr Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
title_full_unstemmed Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
title_sort Heat Treatment Effects on ASTM A890/A 890M GR 5A Super Duplex Stainless Steel Passivity
author Lima,Hillane Mirelle Lopes Ferreira de
author_facet Lima,Hillane Mirelle Lopes Ferreira de
Bastos,Ivan Napoleão
Araújo,Walney Silva
Martins,Marcelo
author_role author
author2 Bastos,Ivan Napoleão
Araújo,Walney Silva
Martins,Marcelo
author2_role author
author
author
dc.contributor.author.fl_str_mv Lima,Hillane Mirelle Lopes Ferreira de
Bastos,Ivan Napoleão
Araújo,Walney Silva
Martins,Marcelo
dc.subject.por.fl_str_mv Super duplex stainless steels
passivity
aging
heat treatment
topic Super duplex stainless steels
passivity
aging
heat treatment
description Heat treatment can modify the corrosion resistance of stainless steels. Thus, the corrosion behavior of ASTM A890/A 890M GR 5A super duplex stainless steels (SDSS) has been investigated in aqueous 60,000 ppm NaCl solution by several electrochemical tests. The specimens were aged for 2, 10, 50 and 100 hours at 475 ºC. Potentiodynamic polarization studies showed that, when the corrosion potential comes to the passivation state, a peak current is detected at about 400 mV vs. Ag/AgCl, with a strong influence on the film stability. The peak current value increased with the aging time; the highest peak value was for the sample aged for 100 h. Three potentials were chosen from the polarization curves in order to evaluate the sample/film/solution behavior and their changes over the passivation range. The results indicate that the passive film was degraded with the increase of the aging time. In addition, the results of the corrosion tests were compared with the evolution of the mechanical properties of the steels by the Vickers microhardness test.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01
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=S1516-14392017000800775
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800775
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2017-0865
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.20 suppl.2 2017
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_ 1754212673777565696

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