Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution

Detalhes bibliográficos
Autor(a) principal: Junqueira,Rosa Maria
Data de Publicação: 2018
Outros Autores: Soares,Renata Braga, Faria,Ricardo Adriano Dorledo de, Lins,Vanessa de Freitas Cunha
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Matéria (Rio de Janeiro. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000100442
Resumo: ABSTRACT Deposition of interference film is an alternative way for the formation of colored protective layers on the surface of stainless steels for decorative applications. The process involves growth of a chromium oxide film by electrochemical methods using in general sulphochromic solutions. However, it is well known that chromic acid contains Cr(VI), which is highly toxic, demanding special effluent treatments in order to avoid environmental pollution. The aim of the present work is to evaluate alternative chromium free solutions for coloration of stainless steel by an electrochemical method as a trial to avoid the Cr(VI) presence to achieve an environmentally friendly process. The morphology and corrosion resistance of the conversion coatings obtained from sodium vanadate solution were comparatively evaluated with a sample coloured in a sodium molybdate solution containing chromium and in a sulfochromic solution currently used in industrial coloration process. The corrosion behaviour of the colored samples was evaluated by using anodic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The steel colored in a solution containing chromium and molybdenum ions showed the lowest corrosion resistance and a more porous and heterogeneous film than the other steel samples colored using vanadate and sulfochromic solutions. An electrochemical processing using a sodium vanadate solution can be a chromium free alternative for industrial application.
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spelling Interference film grown on stainless steel by pulsed current process using chromium free vanadate solutioninterference filmCr(VI)anodic polarizationcolored stainless steelEISFESEMABSTRACT Deposition of interference film is an alternative way for the formation of colored protective layers on the surface of stainless steels for decorative applications. The process involves growth of a chromium oxide film by electrochemical methods using in general sulphochromic solutions. However, it is well known that chromic acid contains Cr(VI), which is highly toxic, demanding special effluent treatments in order to avoid environmental pollution. The aim of the present work is to evaluate alternative chromium free solutions for coloration of stainless steel by an electrochemical method as a trial to avoid the Cr(VI) presence to achieve an environmentally friendly process. The morphology and corrosion resistance of the conversion coatings obtained from sodium vanadate solution were comparatively evaluated with a sample coloured in a sodium molybdate solution containing chromium and in a sulfochromic solution currently used in industrial coloration process. The corrosion behaviour of the colored samples was evaluated by using anodic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The steel colored in a solution containing chromium and molybdenum ions showed the lowest corrosion resistance and a more porous and heterogeneous film than the other steel samples colored using vanadate and sulfochromic solutions. An electrochemical processing using a sodium vanadate solution can be a chromium free alternative for industrial application.Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH22018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000100442Matéria (Rio de Janeiro) v.23 n.1 2018reponame:Matéria (Rio de Janeiro. Online)instname:Matéria (Rio de Janeiro. Online)instacron:RLAM10.1590/s1517-707620170001.0323info:eu-repo/semantics/openAccessJunqueira,Rosa MariaSoares,Renata BragaFaria,Ricardo Adriano Dorledo deLins,Vanessa de Freitas Cunhaeng2018-03-02T00:00:00Zoai:scielo:S1517-70762018000100442Revistahttp://www.materia.coppe.ufrj.br/https://old.scielo.br/oai/scielo-oai.php||materia@labh2.coppe.ufrj.br1517-70761517-7076opendoar:2018-03-02T00:00Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)false
dc.title.none.fl_str_mv Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
title Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
spellingShingle Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
Junqueira,Rosa Maria
interference film
Cr(VI)
anodic polarization
colored stainless steel
EIS
FESEM
title_short Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
title_full Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
title_fullStr Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
title_full_unstemmed Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
title_sort Interference film grown on stainless steel by pulsed current process using chromium free vanadate solution
author Junqueira,Rosa Maria
author_facet Junqueira,Rosa Maria
Soares,Renata Braga
Faria,Ricardo Adriano Dorledo de
Lins,Vanessa de Freitas Cunha
author_role author
author2 Soares,Renata Braga
Faria,Ricardo Adriano Dorledo de
Lins,Vanessa de Freitas Cunha
author2_role author
author
author
dc.contributor.author.fl_str_mv Junqueira,Rosa Maria
Soares,Renata Braga
Faria,Ricardo Adriano Dorledo de
Lins,Vanessa de Freitas Cunha
dc.subject.por.fl_str_mv interference film
Cr(VI)
anodic polarization
colored stainless steel
EIS
FESEM
topic interference film
Cr(VI)
anodic polarization
colored stainless steel
EIS
FESEM
description ABSTRACT Deposition of interference film is an alternative way for the formation of colored protective layers on the surface of stainless steels for decorative applications. The process involves growth of a chromium oxide film by electrochemical methods using in general sulphochromic solutions. However, it is well known that chromic acid contains Cr(VI), which is highly toxic, demanding special effluent treatments in order to avoid environmental pollution. The aim of the present work is to evaluate alternative chromium free solutions for coloration of stainless steel by an electrochemical method as a trial to avoid the Cr(VI) presence to achieve an environmentally friendly process. The morphology and corrosion resistance of the conversion coatings obtained from sodium vanadate solution were comparatively evaluated with a sample coloured in a sodium molybdate solution containing chromium and in a sulfochromic solution currently used in industrial coloration process. The corrosion behaviour of the colored samples was evaluated by using anodic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The steel colored in a solution containing chromium and molybdenum ions showed the lowest corrosion resistance and a more porous and heterogeneous film than the other steel samples colored using vanadate and sulfochromic solutions. An electrochemical processing using a sodium vanadate solution can be a chromium free alternative for industrial application.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01
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=S1517-70762018000100442
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000100442
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1517-707620170001.0323
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 Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
dc.source.none.fl_str_mv Matéria (Rio de Janeiro) v.23 n.1 2018
reponame:Matéria (Rio de Janeiro. Online)
instname:Matéria (Rio de Janeiro. Online)
instacron:RLAM
instname_str Matéria (Rio de Janeiro. Online)
instacron_str RLAM
institution RLAM
reponame_str Matéria (Rio de Janeiro. Online)
collection Matéria (Rio de Janeiro. Online)
repository.name.fl_str_mv Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)
repository.mail.fl_str_mv ||materia@labh2.coppe.ufrj.br
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