Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid
Autor(a) principal: | |
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Data de Publicação: | 2006 |
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=S0872-19042006000300001 |
Resumo: | In this work the characteristics of corrosion and inhibition of 1008 stainless steel in 0.5 mol.L-1 H2SO4 were investigated by physical and electrochemical methods. Organic compounds containing the heteroatom of N as benzotriazole (BTAH), tolytriazole (TTAH) and mixtures of BTAH + TTAH were used as corrosion inhibitors. The techniques used were: open circuit potential, anodic potentiodynamic polarization measurements, chronoamperometry, electrochemical impedance spectroscopy, weight loss and optical microscopy. The anodic polarization showed that the increase of both concentrations BTAH or TTAH diminishes the current density in all the potential anodic range studied; these results together with the weight loss measurements suggest that the inhibitors act by blocking the surface and that the interaction among them is only of destructive nature when inhibiting efficiency is approximated 100%, revealing that at low concentration both inhibitors act without affecting the mechanisms of the cathodic processes, but the anodic polarization curves in presence of the TTAH showed a strong inhibitive effect in all the potential range studied. However, both gravimetric and electrochemical results suggest a synergic effect for the inhibitive efficiency of the mixture 1.10-3 mol.L-1 BTAH + 1.10-3 mol.L-1 TTAH. |
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Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acidcarbon steel 1008corrosioninhibitorsulfuric acidbenzotriazoletolytriazoleIn this work the characteristics of corrosion and inhibition of 1008 stainless steel in 0.5 mol.L-1 H2SO4 were investigated by physical and electrochemical methods. Organic compounds containing the heteroatom of N as benzotriazole (BTAH), tolytriazole (TTAH) and mixtures of BTAH + TTAH were used as corrosion inhibitors. The techniques used were: open circuit potential, anodic potentiodynamic polarization measurements, chronoamperometry, electrochemical impedance spectroscopy, weight loss and optical microscopy. The anodic polarization showed that the increase of both concentrations BTAH or TTAH diminishes the current density in all the potential anodic range studied; these results together with the weight loss measurements suggest that the inhibitors act by blocking the surface and that the interaction among them is only of destructive nature when inhibiting efficiency is approximated 100%, revealing that at low concentration both inhibitors act without affecting the mechanisms of the cathodic processes, but the anodic polarization curves in presence of the TTAH showed a strong inhibitive effect in all the potential range studied. However, both gravimetric and electrochemical results suggest a synergic effect for the inhibitive efficiency of the mixture 1.10-3 mol.L-1 BTAH + 1.10-3 mol.L-1 TTAH.Sociedade Portuguesa de Electroquímica2006-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042006000300001Portugaliae Electrochimica Acta v.24 n.3 2006reponame: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=S0872-19042006000300001Silva,Douglas K. daRibas,Gisele C.B.Cunha,Maico T. daAgostinho,Silvia M.L.Rodrigues,Paulo R.P.info:eu-repo/semantics/openAccess2024-02-06T17:06:49Zoai:scielo:S0872-19042006000300001Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:20:01.055438Repositório 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 |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
title |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
spellingShingle |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid Silva,Douglas K. da carbon steel 1008 corrosion inhibitor sulfuric acid benzotriazole tolytriazole |
title_short |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
title_full |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
title_fullStr |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
title_full_unstemmed |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
title_sort |
Benzotriazole and tolytriazole as corrosion inhibitors of carbon steel 1008 in sulfuric acid |
author |
Silva,Douglas K. da |
author_facet |
Silva,Douglas K. da Ribas,Gisele C.B. Cunha,Maico T. da Agostinho,Silvia M.L. Rodrigues,Paulo R.P. |
author_role |
author |
author2 |
Ribas,Gisele C.B. Cunha,Maico T. da Agostinho,Silvia M.L. Rodrigues,Paulo R.P. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silva,Douglas K. da Ribas,Gisele C.B. Cunha,Maico T. da Agostinho,Silvia M.L. Rodrigues,Paulo R.P. |
dc.subject.por.fl_str_mv |
carbon steel 1008 corrosion inhibitor sulfuric acid benzotriazole tolytriazole |
topic |
carbon steel 1008 corrosion inhibitor sulfuric acid benzotriazole tolytriazole |
description |
In this work the characteristics of corrosion and inhibition of 1008 stainless steel in 0.5 mol.L-1 H2SO4 were investigated by physical and electrochemical methods. Organic compounds containing the heteroatom of N as benzotriazole (BTAH), tolytriazole (TTAH) and mixtures of BTAH + TTAH were used as corrosion inhibitors. The techniques used were: open circuit potential, anodic potentiodynamic polarization measurements, chronoamperometry, electrochemical impedance spectroscopy, weight loss and optical microscopy. The anodic polarization showed that the increase of both concentrations BTAH or TTAH diminishes the current density in all the potential anodic range studied; these results together with the weight loss measurements suggest that the inhibitors act by blocking the surface and that the interaction among them is only of destructive nature when inhibiting efficiency is approximated 100%, revealing that at low concentration both inhibitors act without affecting the mechanisms of the cathodic processes, but the anodic polarization curves in presence of the TTAH showed a strong inhibitive effect in all the potential range studied. However, both gravimetric and electrochemical results suggest a synergic effect for the inhibitive efficiency of the mixture 1.10-3 mol.L-1 BTAH + 1.10-3 mol.L-1 TTAH. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-01-01 |
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=S0872-19042006000300001 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042006000300001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042006000300001 |
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.24 n.3 2006 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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1799137289435086848 |