Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants
Autor(a) principal: | |
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Data de Publicação: | 2007 |
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=S0870-11642007000200003 |
Resumo: | Amphoteric surfactants were tested as corrosion inhibitors for the Cu- Fe alloy corrosion in 1M HCI solutions. Weight - loss, electrochemical polarization, impedance measurements and atomic absorption spectroscopy were the techniques used. The surfactants were alkyl-N- (amino ethylene) - β - aspartamates of molecular formula: H2 N- ( CH2)2 - HN- CH -COOH , ( R=C10 - C 14 ). CH2 CONH-R These surfactants behave as mixed - type inhibitors, i.e. they affect both the cathodic and anodic reactions without changing their mechanisms. The inhibition action of these surfactants may take place through blocking and hydrophobic effects. The inhibition effect increases with the increase of the alkyl group (-R) length. These surfactants were adsorbed in the alloy surface according to the Frumkin isotherm model. The presences of these surfactants in the aggressive media contribute to increases the values of the apparent activation energy. Also, these surfactants refer the preferential dissolution of iron from the alloy. |
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Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric SurfactantsCu - Fe AlloyInhibitorsGalvanostatic PolarizationFrumkin IsothermAmphoteric SurfactantsAmphoteric surfactants were tested as corrosion inhibitors for the Cu- Fe alloy corrosion in 1M HCI solutions. Weight - loss, electrochemical polarization, impedance measurements and atomic absorption spectroscopy were the techniques used. The surfactants were alkyl-N- (amino ethylene) - β - aspartamates of molecular formula: H2 N- ( CH2)2 - HN- CH -COOH , ( R=C10 - C 14 ). CH2 CONH-R These surfactants behave as mixed - type inhibitors, i.e. they affect both the cathodic and anodic reactions without changing their mechanisms. The inhibition action of these surfactants may take place through blocking and hydrophobic effects. The inhibition effect increases with the increase of the alkyl group (-R) length. These surfactants were adsorbed in the alloy surface according to the Frumkin isotherm model. The presences of these surfactants in the aggressive media contribute to increases the values of the apparent activation energy. Also, these surfactants refer the preferential dissolution of iron from the alloy.LNEG - Laboratório Nacional de Energia e Geologia, I.P.2007-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642007000200003Corrosão e Protecção de Materiais v.26 n.2 2007reponame: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=S0870-11642007000200003Mahmoud,S. S.info:eu-repo/semantics/openAccess2024-02-06T16:58:47Zoai:scielo:S0870-11642007000200003Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:15:22.325315Repositório 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 |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
title |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
spellingShingle |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants Mahmoud,S. S. Cu - Fe Alloy Inhibitors Galvanostatic Polarization Frumkin Isotherm Amphoteric Surfactants |
title_short |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
title_full |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
title_fullStr |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
title_full_unstemmed |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
title_sort |
Corrosion Inhibition of Cu- Fe Alloys in HCI Solutions by Amphoteric Surfactants |
author |
Mahmoud,S. S. |
author_facet |
Mahmoud,S. S. |
author_role |
author |
dc.contributor.author.fl_str_mv |
Mahmoud,S. S. |
dc.subject.por.fl_str_mv |
Cu - Fe Alloy Inhibitors Galvanostatic Polarization Frumkin Isotherm Amphoteric Surfactants |
topic |
Cu - Fe Alloy Inhibitors Galvanostatic Polarization Frumkin Isotherm Amphoteric Surfactants |
description |
Amphoteric surfactants were tested as corrosion inhibitors for the Cu- Fe alloy corrosion in 1M HCI solutions. Weight - loss, electrochemical polarization, impedance measurements and atomic absorption spectroscopy were the techniques used. The surfactants were alkyl-N- (amino ethylene) - β - aspartamates of molecular formula: H2 N- ( CH2)2 - HN- CH -COOH , ( R=C10 - C 14 ). CH2 CONH-R These surfactants behave as mixed - type inhibitors, i.e. they affect both the cathodic and anodic reactions without changing their mechanisms. The inhibition action of these surfactants may take place through blocking and hydrophobic effects. The inhibition effect increases with the increase of the alkyl group (-R) length. These surfactants were adsorbed in the alloy surface according to the Frumkin isotherm model. The presences of these surfactants in the aggressive media contribute to increases the values of the apparent activation energy. Also, these surfactants refer the preferential dissolution of iron from the alloy. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-04-01 |
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=S0870-11642007000200003 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642007000200003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0870-11642007000200003 |
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 |
LNEG - Laboratório Nacional de Energia e Geologia, I.P. |
publisher.none.fl_str_mv |
LNEG - Laboratório Nacional de Energia e Geologia, I.P. |
dc.source.none.fl_str_mv |
Corrosão e Protecção de Materiais v.26 n.2 2007 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 |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137254162038784 |