Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel

Detalhes bibliográficos
Autor(a) principal: Alonso-Falleiros,Neusa
Data de Publicação: 1998
Outros Autores: Wolynec,Stephan
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=S1516-14391998000100007
Resumo: The influence of niobium on corrosion resistance to 0.5M H2SO4 of 17% Cr ferritic stainless steels, to which it was added in amounts larger than that necessary to stabilize the interstitial elements, was investigated. Their performance was compared to that of other two Fe-17%Cr alloys, one without additions and another containing 0.93% molybdenum. Through weight and electrochemical measurements and through morphologic examination of corroded surface it was found that the corrosion of these alloys, with the exception of that containing molybdenum, proceeds in two different steps. In the first step (up to about 60 min) the corrosion rate practically does not change with time, the lower rates being displayed by alloys containing larger amounts of Nb. In the second stage the corrosion rate increases with time. The corrosion rate of Mo containing alloy is constant for all times.
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spelling Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steelferritic stainless steel UNS 43000generalized corrosionsulfuric acidniobium additionsThe influence of niobium on corrosion resistance to 0.5M H2SO4 of 17% Cr ferritic stainless steels, to which it was added in amounts larger than that necessary to stabilize the interstitial elements, was investigated. Their performance was compared to that of other two Fe-17%Cr alloys, one without additions and another containing 0.93% molybdenum. Through weight and electrochemical measurements and through morphologic examination of corroded surface it was found that the corrosion of these alloys, with the exception of that containing molybdenum, proceeds in two different steps. In the first step (up to about 60 min) the corrosion rate practically does not change with time, the lower rates being displayed by alloys containing larger amounts of Nb. In the second stage the corrosion rate increases with time. The corrosion rate of Mo containing alloy is constant for all times.ABM, ABC, ABPol1998-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391998000100007Materials Research v.1 n.1 1998reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14391998000100007info:eu-repo/semantics/openAccessAlonso-Falleiros,NeusaWolynec,Stephaneng2000-06-05T00:00:00Zoai:scielo:S1516-14391998000100007Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2000-06-05T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
title Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
spellingShingle Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
Alonso-Falleiros,Neusa
ferritic stainless steel UNS 43000
generalized corrosion
sulfuric acid
niobium additions
title_short Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
title_full Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
title_fullStr Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
title_full_unstemmed Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
title_sort Effect of niobium on corrosion resistance to sulfuric acid of 430 ferritic stainless steel
author Alonso-Falleiros,Neusa
author_facet Alonso-Falleiros,Neusa
Wolynec,Stephan
author_role author
author2 Wolynec,Stephan
author2_role author
dc.contributor.author.fl_str_mv Alonso-Falleiros,Neusa
Wolynec,Stephan
dc.subject.por.fl_str_mv ferritic stainless steel UNS 43000
generalized corrosion
sulfuric acid
niobium additions
topic ferritic stainless steel UNS 43000
generalized corrosion
sulfuric acid
niobium additions
description The influence of niobium on corrosion resistance to 0.5M H2SO4 of 17% Cr ferritic stainless steels, to which it was added in amounts larger than that necessary to stabilize the interstitial elements, was investigated. Their performance was compared to that of other two Fe-17%Cr alloys, one without additions and another containing 0.93% molybdenum. Through weight and electrochemical measurements and through morphologic examination of corroded surface it was found that the corrosion of these alloys, with the exception of that containing molybdenum, proceeds in two different steps. In the first step (up to about 60 min) the corrosion rate practically does not change with time, the lower rates being displayed by alloys containing larger amounts of Nb. In the second stage the corrosion rate increases with time. The corrosion rate of Mo containing alloy is constant for all times.
publishDate 1998
dc.date.none.fl_str_mv 1998-10-01
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=S1516-14391998000100007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391998000100007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14391998000100007
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.1 n.1 1998
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
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