Corrosion protection of hot dip galvanized steel in mortar
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/57136 |
Resumo: | Corrosion of steel in concrete is one of the major causes of structure degradation, requiring expensive maintenance. The using of hot dip galvanized steel (HDGS) has been recognized as one effective measure to increase the service life of reinforced concrete structures in marine environmental. However, HDGS corrodes in contact with high alkaline environment of fresh concrete. Although this initial corrosion process allows the formation of a protecting layer barrier, the corrosion that occurs initially is harmful and chromate conversion layers are usually used to prevent it. Due to toxicity of Cr(VI), these kinds of pre-treatments have been forbidden and hybrid coatings have been proposed as alternatives [1-3]. To evaluate the performance of these coatings, beyond the laboratory characterization, in situ tests in real conditions should be performed. An electrochemical system to measure the macrocell current density (igal) was designed to evaluate the degradation of HDGS coated samples with different organic-inorganic hybrid films, embedded in mortar during 70 days, using an automatic data acquisition system. This system revealed to be feasible and highly sensitive to coatings degradation. Also, allow distinguishing different hybrid coatings with different thicknesses. |
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Corrosion protection of hot dip galvanized steel in mortarCorrosionGalvanized steelProtectionGel coatingSol-gelCiências Naturais::Ciências QuímicasScience & TechnologyCorrosion of steel in concrete is one of the major causes of structure degradation, requiring expensive maintenance. The using of hot dip galvanized steel (HDGS) has been recognized as one effective measure to increase the service life of reinforced concrete structures in marine environmental. However, HDGS corrodes in contact with high alkaline environment of fresh concrete. Although this initial corrosion process allows the formation of a protecting layer barrier, the corrosion that occurs initially is harmful and chromate conversion layers are usually used to prevent it. Due to toxicity of Cr(VI), these kinds of pre-treatments have been forbidden and hybrid coatings have been proposed as alternatives [1-3]. To evaluate the performance of these coatings, beyond the laboratory characterization, in situ tests in real conditions should be performed. An electrochemical system to measure the macrocell current density (igal) was designed to evaluate the degradation of HDGS coated samples with different organic-inorganic hybrid films, embedded in mortar during 70 days, using an automatic data acquisition system. This system revealed to be feasible and highly sensitive to coatings degradation. Also, allow distinguishing different hybrid coatings with different thicknesses.The authors would like to gratefully acknowledge the financial support from Fundação para a Ciência e Tecnologia (FCT) for the PhD grant SFRH/BD/62601/2009 and the financial support by Centro de Química [project F-COMP-01-0124-FEDER-022716 (ref. FCT Pest-C/Qui/UI0686/2011)-FEDER-COMPETE]. The authors would also like to thank Hugo Marques Gomes for assisting in the schematic representations.info:eu-repo/semantics/publishedVersionSociedade Portuguesa de ElectroquímicaUniversidade do MinhoFigueira, R. M.Pereira, E. V.Silva, Carlos J. R.Salta, M. M.20132013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/57136engFIGUEIRA, Rita M.; PEREIRA, Elsa V.; SILVA, Carlos J.R. e SALTA, Maria M.. Corrosion Protection of Hot Dip Galvanized Steel in Mortar. Port. Electrochim. Acta [online]. 2013, vol.31, n.5, pp.277-287. ISSN 0872-1904. http://dx.doi.org/10.4152/pea.201305277.1647-157110.4152/pea.201305277info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T11:53:58Zoai:repositorium.sdum.uminho.pt:1822/57136Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:43:25.545728Repositório 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 protection of hot dip galvanized steel in mortar |
title |
Corrosion protection of hot dip galvanized steel in mortar |
spellingShingle |
Corrosion protection of hot dip galvanized steel in mortar Figueira, R. M. Corrosion Galvanized steel Protection Gel coating Sol-gel Ciências Naturais::Ciências Químicas Science & Technology |
title_short |
Corrosion protection of hot dip galvanized steel in mortar |
title_full |
Corrosion protection of hot dip galvanized steel in mortar |
title_fullStr |
Corrosion protection of hot dip galvanized steel in mortar |
title_full_unstemmed |
Corrosion protection of hot dip galvanized steel in mortar |
title_sort |
Corrosion protection of hot dip galvanized steel in mortar |
author |
Figueira, R. M. |
author_facet |
Figueira, R. M. Pereira, E. V. Silva, Carlos J. R. Salta, M. M. |
author_role |
author |
author2 |
Pereira, E. V. Silva, Carlos J. R. Salta, M. M. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Figueira, R. M. Pereira, E. V. Silva, Carlos J. R. Salta, M. M. |
dc.subject.por.fl_str_mv |
Corrosion Galvanized steel Protection Gel coating Sol-gel Ciências Naturais::Ciências Químicas Science & Technology |
topic |
Corrosion Galvanized steel Protection Gel coating Sol-gel Ciências Naturais::Ciências Químicas Science & Technology |
description |
Corrosion of steel in concrete is one of the major causes of structure degradation, requiring expensive maintenance. The using of hot dip galvanized steel (HDGS) has been recognized as one effective measure to increase the service life of reinforced concrete structures in marine environmental. However, HDGS corrodes in contact with high alkaline environment of fresh concrete. Although this initial corrosion process allows the formation of a protecting layer barrier, the corrosion that occurs initially is harmful and chromate conversion layers are usually used to prevent it. Due to toxicity of Cr(VI), these kinds of pre-treatments have been forbidden and hybrid coatings have been proposed as alternatives [1-3]. To evaluate the performance of these coatings, beyond the laboratory characterization, in situ tests in real conditions should be performed. An electrochemical system to measure the macrocell current density (igal) was designed to evaluate the degradation of HDGS coated samples with different organic-inorganic hybrid films, embedded in mortar during 70 days, using an automatic data acquisition system. This system revealed to be feasible and highly sensitive to coatings degradation. Also, allow distinguishing different hybrid coatings with different thicknesses. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013 2013-01-01T00:00:00Z |
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://hdl.handle.net/1822/57136 |
url |
http://hdl.handle.net/1822/57136 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
FIGUEIRA, Rita M.; PEREIRA, Elsa V.; SILVA, Carlos J.R. e SALTA, Maria M.. Corrosion Protection of Hot Dip Galvanized Steel in Mortar. Port. Electrochim. Acta [online]. 2013, vol.31, n.5, pp.277-287. ISSN 0872-1904. http://dx.doi.org/10.4152/pea.201305277. 1647-1571 10.4152/pea.201305277 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 |
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 |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
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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1799132180256915456 |