Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential

Detalhes bibliográficos
Autor(a) principal: Rios,J. F
Data de Publicação: 2011
Outros Autores: Calderón,J. A, Nogueira,R. P
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=S0103-50532011000700023
Resumo: The electrochemical behavior of copper in near-neutral aerated tap water was studied by potentiodynamic polarization and electrochemical impedance spectroscopy up to four days of immersion under different hydrodynamic conditions. The impedance results were interpreted by equivalent circuit that showed an increasing film thickness with time that hinders the diffusion of copper species across the oxide layer, which is larger in stagnating condition. At low anodic overpotential, copper impedance presents at least four time constants that could be explained by faradaic processes, adsorption/desorption of intermediate species, diffusion controlled process and oxide layer formation on copper surface. In the anodic region, the overall corrosion resistance decreases possibly due to the dissolution of copper species and the increase of diffusion across the oxide layer, mainly under hydrodynamic condition.
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spelling Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotentialcoppercorrosiondrinking waterEISpolarizationThe electrochemical behavior of copper in near-neutral aerated tap water was studied by potentiodynamic polarization and electrochemical impedance spectroscopy up to four days of immersion under different hydrodynamic conditions. The impedance results were interpreted by equivalent circuit that showed an increasing film thickness with time that hinders the diffusion of copper species across the oxide layer, which is larger in stagnating condition. At low anodic overpotential, copper impedance presents at least four time constants that could be explained by faradaic processes, adsorption/desorption of intermediate species, diffusion controlled process and oxide layer formation on copper surface. In the anodic region, the overall corrosion resistance decreases possibly due to the dissolution of copper species and the increase of diffusion across the oxide layer, mainly under hydrodynamic condition.Sociedade Brasileira de Química2011-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000700023Journal of the Brazilian Chemical Society v.22 n.7 2011reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532011000700023info:eu-repo/semantics/openAccessRios,J. FCalderón,J. ANogueira,R. Peng2011-07-22T00:00:00Zoai:scielo:S0103-50532011000700023Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2011-07-22T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
title Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
spellingShingle Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
Rios,J. F
copper
corrosion
drinking water
EIS
polarization
title_short Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
title_full Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
title_fullStr Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
title_full_unstemmed Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
title_sort Electrochemical behavior of copper in drinking water: evaluation of dissolution process at low anodic overpotential
author Rios,J. F
author_facet Rios,J. F
Calderón,J. A
Nogueira,R. P
author_role author
author2 Calderón,J. A
Nogueira,R. P
author2_role author
author
dc.contributor.author.fl_str_mv Rios,J. F
Calderón,J. A
Nogueira,R. P
dc.subject.por.fl_str_mv copper
corrosion
drinking water
EIS
polarization
topic copper
corrosion
drinking water
EIS
polarization
description The electrochemical behavior of copper in near-neutral aerated tap water was studied by potentiodynamic polarization and electrochemical impedance spectroscopy up to four days of immersion under different hydrodynamic conditions. The impedance results were interpreted by equivalent circuit that showed an increasing film thickness with time that hinders the diffusion of copper species across the oxide layer, which is larger in stagnating condition. At low anodic overpotential, copper impedance presents at least four time constants that could be explained by faradaic processes, adsorption/desorption of intermediate species, diffusion controlled process and oxide layer formation on copper surface. In the anodic region, the overall corrosion resistance decreases possibly due to the dissolution of copper species and the increase of diffusion across the oxide layer, mainly under hydrodynamic condition.
publishDate 2011
dc.date.none.fl_str_mv 2011-07-01
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=S0103-50532011000700023
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000700023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532011000700023
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.22 n.7 2011
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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