Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , |
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=S0872-19042003000200001 |
Resumo: | The inhibition behavior of chromate ions towards corrosion and dezincification of α-brass (Cu/Zn: 64/36) in acetate buffer solutions (pH 2.4, 7.0 and 8.5) containing 3% sodium chloride was studied. Weight loss and solution analysis were used for a long period (four weeks) and electrochemical polarization for a short period (one hour). Chromate accelerated corrosion and dezincification at pH 2.4 by acting as depolarizer but chromate suppressed efficiently the corrosion and dezincification at pH 8.5. At pH 7.0 the corrosion and dezincification suppressed in the presence of chromate but the inhibition action started to deteriorate at chromate concentration less than 0.005 mol/L. The inhibition effect is attributed to adsorption of chromate ions on the corroding surface and improvement of the passivity. Chromate led to an increase in the concentration of copper species in solution due to the formation of the more soluble CuCrO4 than Cu2O, which contributed to the apparent suppression of dezincification. |
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Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions<FONT FACE=Symbol>a</font>-brasscorrosion inhibitiondezincificationchromateThe inhibition behavior of chromate ions towards corrosion and dezincification of α-brass (Cu/Zn: 64/36) in acetate buffer solutions (pH 2.4, 7.0 and 8.5) containing 3% sodium chloride was studied. Weight loss and solution analysis were used for a long period (four weeks) and electrochemical polarization for a short period (one hour). Chromate accelerated corrosion and dezincification at pH 2.4 by acting as depolarizer but chromate suppressed efficiently the corrosion and dezincification at pH 8.5. At pH 7.0 the corrosion and dezincification suppressed in the presence of chromate but the inhibition action started to deteriorate at chromate concentration less than 0.005 mol/L. The inhibition effect is attributed to adsorption of chromate ions on the corroding surface and improvement of the passivity. Chromate led to an increase in the concentration of copper species in solution due to the formation of the more soluble CuCrO4 than Cu2O, which contributed to the apparent suppression of dezincification.Sociedade Portuguesa de Electroquímica2003-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042003000200001Portugaliae Electrochimica Acta v.21 n.2 2003reponame: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=S0872-19042003000200001Rehan,H. H.Al-Moubarak,N.A.Al-Rafai,H.A.info:eu-repo/semantics/openAccess2024-02-06T17:06:40Zoai:scielo:S0872-19042003000200001Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:19:55.884247Repositório 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 |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
title |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
spellingShingle |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions Rehan,H. H. <FONT FACE=Symbol>a</font>-brass corrosion inhibition dezincification chromate |
title_short |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
title_full |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
title_fullStr |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
title_full_unstemmed |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
title_sort |
Evaluation of Chromate as Dezincification Inhibitor for α-brass (Cu/Zn : 64/36) in 3% Chloride Buffer Solutions |
author |
Rehan,H. H. |
author_facet |
Rehan,H. H. Al-Moubarak,N.A. Al-Rafai,H.A. |
author_role |
author |
author2 |
Al-Moubarak,N.A. Al-Rafai,H.A. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Rehan,H. H. Al-Moubarak,N.A. Al-Rafai,H.A. |
dc.subject.por.fl_str_mv |
<FONT FACE=Symbol>a</font>-brass corrosion inhibition dezincification chromate |
topic |
<FONT FACE=Symbol>a</font>-brass corrosion inhibition dezincification chromate |
description |
The inhibition behavior of chromate ions towards corrosion and dezincification of α-brass (Cu/Zn: 64/36) in acetate buffer solutions (pH 2.4, 7.0 and 8.5) containing 3% sodium chloride was studied. Weight loss and solution analysis were used for a long period (four weeks) and electrochemical polarization for a short period (one hour). Chromate accelerated corrosion and dezincification at pH 2.4 by acting as depolarizer but chromate suppressed efficiently the corrosion and dezincification at pH 8.5. At pH 7.0 the corrosion and dezincification suppressed in the presence of chromate but the inhibition action started to deteriorate at chromate concentration less than 0.005 mol/L. The inhibition effect is attributed to adsorption of chromate ions on the corroding surface and improvement of the passivity. Chromate led to an increase in the concentration of copper species in solution due to the formation of the more soluble CuCrO4 than Cu2O, which contributed to the apparent suppression of dezincification. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 |
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=S0872-19042003000200001 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042003000200001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042003000200001 |
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.21 n.2 2003 reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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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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1799137288894021632 |