Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium
Autor(a) principal: | |
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Data de Publicação: | 2008 |
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=S0872-19042008000200003 |
Resumo: | The inhibitive effect of exudate gum from Dacroydes edulis in the corrosion of aluminium in HCl solutions was studied using weight loss and thermometric methods at 30-60 ºC. The results reveal that the exudate gum acts as an inhibitor for corrosion of aluminium in HCl solution. The inhibition efficiency increases with an increase in the concentration of the exudate gum but decreases with increase in temperature. The Temkim adsorption isotherm was tested for its fit to the experimental data. The result confirms that the corrosion inhibition of the exudate gum from DE is attributed to the adsorption of molecules of phytochemicals present in the exudate gum on the surface of the metal. The free energies and equilibrium constant for the adsorption process were determined. A mechanism of physical adsorption is proposed. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminiumcorrosion inhibitionaluminiumDacroydes edulisadsorptionTemkin isothermThe inhibitive effect of exudate gum from Dacroydes edulis in the corrosion of aluminium in HCl solutions was studied using weight loss and thermometric methods at 30-60 ºC. The results reveal that the exudate gum acts as an inhibitor for corrosion of aluminium in HCl solution. The inhibition efficiency increases with an increase in the concentration of the exudate gum but decreases with increase in temperature. The Temkim adsorption isotherm was tested for its fit to the experimental data. The result confirms that the corrosion inhibition of the exudate gum from DE is attributed to the adsorption of molecules of phytochemicals present in the exudate gum on the surface of the metal. The free energies and equilibrium constant for the adsorption process were determined. A mechanism of physical adsorption is proposed.Sociedade Portuguesa de Electroquímica2008-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042008000200003Portugaliae Electrochimica Acta v.26 n.2 2008reponame: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=S0872-19042008000200003Umoren,S.A.Obot,I.B.Ebenso,E.E.Obi-Egbedi,N.info:eu-repo/semantics/openAccess2024-02-06T17:06:55Zoai:scielo:S0872-19042008000200003Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:20:04.061812Repositório 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 |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
title |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
spellingShingle |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium Umoren,S.A. corrosion inhibition aluminium Dacroydes edulis adsorption Temkin isotherm |
title_short |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
title_full |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
title_fullStr |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
title_full_unstemmed |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
title_sort |
Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of Aluminium |
author |
Umoren,S.A. |
author_facet |
Umoren,S.A. Obot,I.B. Ebenso,E.E. Obi-Egbedi,N. |
author_role |
author |
author2 |
Obot,I.B. Ebenso,E.E. Obi-Egbedi,N. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Umoren,S.A. Obot,I.B. Ebenso,E.E. Obi-Egbedi,N. |
dc.subject.por.fl_str_mv |
corrosion inhibition aluminium Dacroydes edulis adsorption Temkin isotherm |
topic |
corrosion inhibition aluminium Dacroydes edulis adsorption Temkin isotherm |
description |
The inhibitive effect of exudate gum from Dacroydes edulis in the corrosion of aluminium in HCl solutions was studied using weight loss and thermometric methods at 30-60 ºC. The results reveal that the exudate gum acts as an inhibitor for corrosion of aluminium in HCl solution. The inhibition efficiency increases with an increase in the concentration of the exudate gum but decreases with increase in temperature. The Temkim adsorption isotherm was tested for its fit to the experimental data. The result confirms that the corrosion inhibition of the exudate gum from DE is attributed to the adsorption of molecules of phytochemicals present in the exudate gum on the surface of the metal. The free energies and equilibrium constant for the adsorption process were determined. A mechanism of physical adsorption is proposed. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-01-01 |
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=S0872-19042008000200003 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042008000200003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042008000200003 |
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.26 n.2 2008 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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1799137289870245888 |