Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions

Detalhes bibliográficos
Autor(a) principal: Begum,S. Nathira
Data de Publicação: 2010
Outros Autores: Basha,C. Ahmed, Muralidharan,V.S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000300001
Resumo: Cyclic voltammetric studies were carried out on pure iron in alkaline borate and phosphate buffer solutions at pH 10.8. At higher potentials, on anodic polarization, iron forms FeB4O7 and FeOOH in borate buffer, and FeHPO4 in phosphate buffer which got converted to higher valency phosphates. In phosphate solutions, in presence of halides, the interfacial diffusion layer turned to be cation selective outer sublayer and an anion selective inner sublayer, and in borate solutions a precipitate layer of metal oxyhydroxide was formed, which was anion selective, and anions adsorb on this.
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spelling Role of Halides on the Passivation of Iron in Alkaline Buffer Solutionsironcyclic voltammetrypassivityalkaline corrosioninterfacesanodic filmsCyclic voltammetric studies were carried out on pure iron in alkaline borate and phosphate buffer solutions at pH 10.8. At higher potentials, on anodic polarization, iron forms FeB4O7 and FeOOH in borate buffer, and FeHPO4 in phosphate buffer which got converted to higher valency phosphates. In phosphate solutions, in presence of halides, the interfacial diffusion layer turned to be cation selective outer sublayer and an anion selective inner sublayer, and in borate solutions a precipitate layer of metal oxyhydroxide was formed, which was anion selective, and anions adsorb on this.Sociedade Portuguesa de Electroquímica2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000300001Portugaliae Electrochimica Acta v.28 n.3 2010reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000300001Begum,S. NathiraBasha,C. AhmedMuralidharan,V.S.info:eu-repo/semantics/openAccess2024-02-06T17:07:04Zoai:scielo:S0872-19042010000300001Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:20:08.898965Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
title Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
spellingShingle Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
Begum,S. Nathira
iron
cyclic voltammetry
passivity
alkaline corrosion
interfaces
anodic films
title_short Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
title_full Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
title_fullStr Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
title_full_unstemmed Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
title_sort Role of Halides on the Passivation of Iron in Alkaline Buffer Solutions
author Begum,S. Nathira
author_facet Begum,S. Nathira
Basha,C. Ahmed
Muralidharan,V.S.
author_role author
author2 Basha,C. Ahmed
Muralidharan,V.S.
author2_role author
author
dc.contributor.author.fl_str_mv Begum,S. Nathira
Basha,C. Ahmed
Muralidharan,V.S.
dc.subject.por.fl_str_mv iron
cyclic voltammetry
passivity
alkaline corrosion
interfaces
anodic films
topic iron
cyclic voltammetry
passivity
alkaline corrosion
interfaces
anodic films
description Cyclic voltammetric studies were carried out on pure iron in alkaline borate and phosphate buffer solutions at pH 10.8. At higher potentials, on anodic polarization, iron forms FeB4O7 and FeOOH in borate buffer, and FeHPO4 in phosphate buffer which got converted to higher valency phosphates. In phosphate solutions, in presence of halides, the interfacial diffusion layer turned to be cation selective outer sublayer and an anion selective inner sublayer, and in borate solutions a precipitate layer of metal oxyhydroxide was formed, which was anion selective, and anions adsorb on this.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000300001
url http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000300001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042010000300001
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 Portuguesa de Electroquímica
publisher.none.fl_str_mv Sociedade Portuguesa de Electroquímica
dc.source.none.fl_str_mv Portugaliae Electrochimica Acta v.28 n.3 2010
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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