Passivation of iron in solutions containing borate using rotating ring-disc measurements

Detalhes bibliográficos
Autor(a) principal: Martini,Emilse M.A.
Data de Publicação: 1999
Outros Autores: Muller,Iduvirges L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600014
Resumo: The electrochemical behavior of iron in neutral solutions of perchlorate and low borate concentrations was investigated using cyclic voltammetry and the rotating ring-disc electrode techniques. In solutions containing just perchlorate, iron passivation was observed at potentials higher than the potential of an anodic peak corresponding to the active range at which the dissolution of Fe2+ and Fe3+ species was detected. When borate is added to the solution, this anodic peak decreased as well as the amount of the active soluble species. The increase of pH, keeping the borate and perchlorate concentrations constant, was found to be less effective at promoting iron passivation than the increase of borate concentration. The results demonstrated that the interaction between borate ion and the electrode surface occurs by chemical adsorption according to the Langmuir isotherm.
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spelling Passivation of iron in solutions containing borate using rotating ring-disc measurementsiron passivityborate passivityanodic filmsThe electrochemical behavior of iron in neutral solutions of perchlorate and low borate concentrations was investigated using cyclic voltammetry and the rotating ring-disc electrode techniques. In solutions containing just perchlorate, iron passivation was observed at potentials higher than the potential of an anodic peak corresponding to the active range at which the dissolution of Fe2+ and Fe3+ species was detected. When borate is added to the solution, this anodic peak decreased as well as the amount of the active soluble species. The increase of pH, keeping the borate and perchlorate concentrations constant, was found to be less effective at promoting iron passivation than the increase of borate concentration. The results demonstrated that the interaction between borate ion and the electrode surface occurs by chemical adsorption according to the Langmuir isotherm.Sociedade Brasileira de Química1999-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600014Journal of the Brazilian Chemical Society v.10 n.6 1999reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531999000600014info:eu-repo/semantics/openAccessMartini,Emilse M.A.Muller,Iduvirges L.eng2001-06-01T00:00:00Zoai:scielo:S0103-50531999000600014Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2001-06-01T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Passivation of iron in solutions containing borate using rotating ring-disc measurements
title Passivation of iron in solutions containing borate using rotating ring-disc measurements
spellingShingle Passivation of iron in solutions containing borate using rotating ring-disc measurements
Martini,Emilse M.A.
iron passivity
borate passivity
anodic films
title_short Passivation of iron in solutions containing borate using rotating ring-disc measurements
title_full Passivation of iron in solutions containing borate using rotating ring-disc measurements
title_fullStr Passivation of iron in solutions containing borate using rotating ring-disc measurements
title_full_unstemmed Passivation of iron in solutions containing borate using rotating ring-disc measurements
title_sort Passivation of iron in solutions containing borate using rotating ring-disc measurements
author Martini,Emilse M.A.
author_facet Martini,Emilse M.A.
Muller,Iduvirges L.
author_role author
author2 Muller,Iduvirges L.
author2_role author
dc.contributor.author.fl_str_mv Martini,Emilse M.A.
Muller,Iduvirges L.
dc.subject.por.fl_str_mv iron passivity
borate passivity
anodic films
topic iron passivity
borate passivity
anodic films
description The electrochemical behavior of iron in neutral solutions of perchlorate and low borate concentrations was investigated using cyclic voltammetry and the rotating ring-disc electrode techniques. In solutions containing just perchlorate, iron passivation was observed at potentials higher than the potential of an anodic peak corresponding to the active range at which the dissolution of Fe2+ and Fe3+ species was detected. When borate is added to the solution, this anodic peak decreased as well as the amount of the active soluble species. The increase of pH, keeping the borate and perchlorate concentrations constant, was found to be less effective at promoting iron passivation than the increase of borate concentration. The results demonstrated that the interaction between borate ion and the electrode surface occurs by chemical adsorption according to the Langmuir isotherm.
publishDate 1999
dc.date.none.fl_str_mv 1999-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600014
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600014
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531999000600014
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.10 n.6 1999
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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