Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews

Detalhes bibliográficos
Autor(a) principal: Oliveira, Daiane Festraets de
Data de Publicação: 2018
Outros Autores: Silva, Carmelita Gomes da, Cardoso, Sheila Pressentin
Tipo de documento: Artigo
Idioma: por
Título da fonte: Research, Society and Development
Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/479
Resumo: The work presents an evaluation of the ethanolic and aqueous extracts of Plectranthus barbatus Andrews (Brazilian boldo) as potential natural corrosion inhibitors for P110 carbon steel and 22Cr-7Ni-3Mo stainless steel (duplex 22 %Cr) in a medium containing hydrochloric acid 1,0 mol.L-1 and sulfuric acid 0,5 mol.L-1. The study was carried out under of gravimetric tests with variation in the concentration of extracts and attainment inhibition efficiency, and by analyzing the chemistry profile to identify metabolites present in the extracts. The results indicated the absence of terpenes and the presence of flavonoids, tannins and phenolic compounds in both extracts. The gravimetric tests showed that the extracts present excellent results for carbon steel in both acids with inhibition efficiency values higher than 90 %, indicating the potential of the extracts as corrosion inhibitors for carbon steel. However, they do not present for stainless steel the same performance, revealing low inhibition efficiency values not justifying the use of the extracts as inhibitors for this steel. The aqueous and ethanolic extracts have different behaviors according to the acid used, with the ethanolic giving better results in sulfuric acid and aqueous extract in hydrochloric acid.
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spelling Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus AndrewsInhibidor de corrosión ambientalmente seguro: evaluando extractos de Plectranthus barbatus AndrewsInibidor de corrosão ambientalmente seguro: avaliando extratos de Plectranthus barbatus AndrewsCorrosion inhibitorCarbon steelStainless steelPlectranthus barbatus Andrews.Inibidor de corrosãoAço carbonoAço inoxidávelPlectranthus barbatus Andrews.The work presents an evaluation of the ethanolic and aqueous extracts of Plectranthus barbatus Andrews (Brazilian boldo) as potential natural corrosion inhibitors for P110 carbon steel and 22Cr-7Ni-3Mo stainless steel (duplex 22 %Cr) in a medium containing hydrochloric acid 1,0 mol.L-1 and sulfuric acid 0,5 mol.L-1. The study was carried out under of gravimetric tests with variation in the concentration of extracts and attainment inhibition efficiency, and by analyzing the chemistry profile to identify metabolites present in the extracts. The results indicated the absence of terpenes and the presence of flavonoids, tannins and phenolic compounds in both extracts. The gravimetric tests showed that the extracts present excellent results for carbon steel in both acids with inhibition efficiency values higher than 90 %, indicating the potential of the extracts as corrosion inhibitors for carbon steel. However, they do not present for stainless steel the same performance, revealing low inhibition efficiency values not justifying the use of the extracts as inhibitors for this steel. The aqueous and ethanolic extracts have different behaviors according to the acid used, with the ethanolic giving better results in sulfuric acid and aqueous extract in hydrochloric acid.El trabajo presenta una evaluación de los extractos etanólico y acuoso de Plectranthus barbatus Andrews (boldo brasileño) como potenciales inhibidores naturales de corrosión para el acero carbono P110 e inoxidable 22Cr-7Ni-3Mo (dúplex 22% Cr), en medio conteniendo ácido clorhídrico 1, 0 mol.L-1 y ácido sulfúrico 0,5 mol.L-1. El estudio fue realizado a partir de ensayos gravimétricos con variación en la concentración de los extractos y obtención de las eficiencias de inhibición, y por el análisis del perfil químico para identificar los metabolitos presentes en los extractos. Los resultados indicaron la ausencia de terpenos y la presencia de flavonoides, taninos y compuestos fenólicos en ambos extractos. Los ensayos gravimétricos mostraron que los extractos presentan excelentes resultados para el acero carbono, en ambos ácidos, con valores de eficiencia de inhibición superiores al 90%, revelando el potencial de los extractos como inhibidores de corrosión para el acero carbono. Sin embargo, no presentan para el acero inoxidable el mismo rendimiento, revelando valores bajos de eficiencia de inhibición no justificando el uso de los extractos como inhibidores para este acero. Los extractos acuoso y etanólico poseen comportamientos diferentes según el ácido empleado, con el etanólico proporcionando mejores resultados en ácido sulfúrico y el acuoso en ácido clorhídrico.O trabalho apresenta uma avaliação dos extratos etanólico e aquoso de Plectranthus barbatus Andrews (boldo brasileiro) como potenciais inibidores naturais de corrosão para o aço carbono P110 e inoxidável 22Cr-7Ni-3Mo (duplex 22 %Cr), em meio contendo ácido clorídrico 1,0 mol.L-1 e ácido sulfúrico 0,5 mol.L-1. O estudo foi realizado a partir de ensaios gravimétricos com variação na concentração dos extratos e obtenção das eficiências de inibição, e pela análise do perfil químico para identificar metabólitos presentes nos extratos. Os resultados indicaram a ausência de terpenos e a presença de flavonoides, taninos e compostos fenólicos em ambos os extratos. Os ensaios gravimétricos mostraram que os extratos apresentam excelentes resultados para o aço carbono, em ambos os ácidos, com valores de eficiência de inibição superiores a 90 %, revelando o potencial dos extratos como inibidores de corrosão para o aço carbono. Contudo, não apresentam para o aço inoxidável o mesmo desempenho, revelando valores baixos de eficiência de inibição não justificando o uso dos extratos como inibidores para este aço. Os extratos aquoso e etanólico possuem comportamentos diferentes conforme o ácido empregado, com o etanólico proporcionando melhores resultados em ácido sulfúrico e o aquoso em ácido clorídrico.Research, Society and Development2018-08-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/47910.33448/rsd-v7i12.479Research, Society and Development; Vol. 7 No. 12; e3712479Research, Society and Development; Vol. 7 Núm. 12; e3712479Research, Society and Development; v. 7 n. 12; e37124792525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/479/350Copyright (c) 2018 Daiane Festraets de Oliveira, Carmelita Gomes da Silva, Sheila Pressentin Cardosoinfo:eu-repo/semantics/openAccessOliveira, Daiane Festraets deSilva, Carmelita Gomes daCardoso, Sheila Pressentin2020-03-25T15:59:11Zoai:ojs.pkp.sfu.ca:article/479Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:25:57.494649Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false
dc.title.none.fl_str_mv Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
Inhibidor de corrosión ambientalmente seguro: evaluando extractos de Plectranthus barbatus Andrews
Inibidor de corrosão ambientalmente seguro: avaliando extratos de Plectranthus barbatus Andrews
title Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
spellingShingle Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
Oliveira, Daiane Festraets de
Corrosion inhibitor
Carbon steel
Stainless steel
Plectranthus barbatus Andrews.
Inibidor de corrosão
Aço carbono
Aço inoxidável
Plectranthus barbatus Andrews.
title_short Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
title_full Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
title_fullStr Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
title_full_unstemmed Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
title_sort Environmentally safe corrosion inhibitor: evaluating extracts of Plectranthus barbatus Andrews
author Oliveira, Daiane Festraets de
author_facet Oliveira, Daiane Festraets de
Silva, Carmelita Gomes da
Cardoso, Sheila Pressentin
author_role author
author2 Silva, Carmelita Gomes da
Cardoso, Sheila Pressentin
author2_role author
author
dc.contributor.author.fl_str_mv Oliveira, Daiane Festraets de
Silva, Carmelita Gomes da
Cardoso, Sheila Pressentin
dc.subject.por.fl_str_mv Corrosion inhibitor
Carbon steel
Stainless steel
Plectranthus barbatus Andrews.
Inibidor de corrosão
Aço carbono
Aço inoxidável
Plectranthus barbatus Andrews.
topic Corrosion inhibitor
Carbon steel
Stainless steel
Plectranthus barbatus Andrews.
Inibidor de corrosão
Aço carbono
Aço inoxidável
Plectranthus barbatus Andrews.
description The work presents an evaluation of the ethanolic and aqueous extracts of Plectranthus barbatus Andrews (Brazilian boldo) as potential natural corrosion inhibitors for P110 carbon steel and 22Cr-7Ni-3Mo stainless steel (duplex 22 %Cr) in a medium containing hydrochloric acid 1,0 mol.L-1 and sulfuric acid 0,5 mol.L-1. The study was carried out under of gravimetric tests with variation in the concentration of extracts and attainment inhibition efficiency, and by analyzing the chemistry profile to identify metabolites present in the extracts. The results indicated the absence of terpenes and the presence of flavonoids, tannins and phenolic compounds in both extracts. The gravimetric tests showed that the extracts present excellent results for carbon steel in both acids with inhibition efficiency values higher than 90 %, indicating the potential of the extracts as corrosion inhibitors for carbon steel. However, they do not present for stainless steel the same performance, revealing low inhibition efficiency values not justifying the use of the extracts as inhibitors for this steel. The aqueous and ethanolic extracts have different behaviors according to the acid used, with the ethanolic giving better results in sulfuric acid and aqueous extract in hydrochloric acid.
publishDate 2018
dc.date.none.fl_str_mv 2018-08-23
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/479
10.33448/rsd-v7i12.479
url https://rsdjournal.org/index.php/rsd/article/view/479
identifier_str_mv 10.33448/rsd-v7i12.479
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/479/350
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 Research, Society and Development
publisher.none.fl_str_mv Research, Society and Development
dc.source.none.fl_str_mv Research, Society and Development; Vol. 7 No. 12; e3712479
Research, Society and Development; Vol. 7 Núm. 12; e3712479
Research, Society and Development; v. 7 n. 12; e3712479
2525-3409
reponame:Research, Society and Development
instname:Universidade Federal de Itajubá (UNIFEI)
instacron:UNIFEI
instname_str Universidade Federal de Itajubá (UNIFEI)
instacron_str UNIFEI
institution UNIFEI
reponame_str Research, Society and Development
collection Research, Society and Development
repository.name.fl_str_mv Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)
repository.mail.fl_str_mv rsd.articles@gmail.com
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