Modified cassava starches as potential corrosion inhibitors for sustainable development

Detalhes bibliográficos
Autor(a) principal: Ochoa,Nathalie
Data de Publicação: 2013
Outros Autores: Bello,Marisela, Sancristóbal,Janet, Balsamo,Vittoria, Albornoz,Alberto, Brito,Joaquin L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600001
Resumo: Activated (AS) and carboxymethylated (CMS0.24) cassava starch derivatives were studied as corrosion inhibitors for carbon steel XC35 in a 200 mgL-1 NaCl solution. They were characterized by back titration and Fourier Transform Infrared Spectroscopy (FTIR). Electrochemical techniques were used to evaluate the inhibitive properties of starches at room temperature and the chemical composition of the protective films was determined by X-Ray Photoelectron Spectroscopy (XPS). Electrochemical measurements revealed that AS acts as mixed inhibitor, whereas CMS0.24 mainly inhibits the anodic reaction. In both cases, the protection increased with the inhibitor concentration; nevertheless, after 24 hours of immersion, the CMS0.24 loses its properties, while AS molecules still maintains them. XPS analyses show that the inhibitive films are composed of an iron oxide/hydroxide mixture in which starch molecules are incorporated. Results were explained taking into consideration the hydrophilicity and the strength of the ionic interaction of the starches with the metal surface.
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spelling Modified cassava starches as potential corrosion inhibitors for sustainable developmentcarbon steelgreen corrosion inhibitorselectrochemical measurementscassava starchActivated (AS) and carboxymethylated (CMS0.24) cassava starch derivatives were studied as corrosion inhibitors for carbon steel XC35 in a 200 mgL-1 NaCl solution. They were characterized by back titration and Fourier Transform Infrared Spectroscopy (FTIR). Electrochemical techniques were used to evaluate the inhibitive properties of starches at room temperature and the chemical composition of the protective films was determined by X-Ray Photoelectron Spectroscopy (XPS). Electrochemical measurements revealed that AS acts as mixed inhibitor, whereas CMS0.24 mainly inhibits the anodic reaction. In both cases, the protection increased with the inhibitor concentration; nevertheless, after 24 hours of immersion, the CMS0.24 loses its properties, while AS molecules still maintains them. XPS analyses show that the inhibitive films are composed of an iron oxide/hydroxide mixture in which starch molecules are incorporated. Results were explained taking into consideration the hydrophilicity and the strength of the ionic interaction of the starches with the metal surface.ABM, ABC, ABPol2013-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600001Materials Research v.16 n.6 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000126info:eu-repo/semantics/openAccessOchoa,NathalieBello,MariselaSancristóbal,JanetBalsamo,VittoriaAlbornoz,AlbertoBrito,Joaquin L.eng2013-12-12T00:00:00Zoai:scielo:S1516-14392013000600001Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-12-12T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Modified cassava starches as potential corrosion inhibitors for sustainable development
title Modified cassava starches as potential corrosion inhibitors for sustainable development
spellingShingle Modified cassava starches as potential corrosion inhibitors for sustainable development
Ochoa,Nathalie
carbon steel
green corrosion inhibitors
electrochemical measurements
cassava starch
title_short Modified cassava starches as potential corrosion inhibitors for sustainable development
title_full Modified cassava starches as potential corrosion inhibitors for sustainable development
title_fullStr Modified cassava starches as potential corrosion inhibitors for sustainable development
title_full_unstemmed Modified cassava starches as potential corrosion inhibitors for sustainable development
title_sort Modified cassava starches as potential corrosion inhibitors for sustainable development
author Ochoa,Nathalie
author_facet Ochoa,Nathalie
Bello,Marisela
Sancristóbal,Janet
Balsamo,Vittoria
Albornoz,Alberto
Brito,Joaquin L.
author_role author
author2 Bello,Marisela
Sancristóbal,Janet
Balsamo,Vittoria
Albornoz,Alberto
Brito,Joaquin L.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Ochoa,Nathalie
Bello,Marisela
Sancristóbal,Janet
Balsamo,Vittoria
Albornoz,Alberto
Brito,Joaquin L.
dc.subject.por.fl_str_mv carbon steel
green corrosion inhibitors
electrochemical measurements
cassava starch
topic carbon steel
green corrosion inhibitors
electrochemical measurements
cassava starch
description Activated (AS) and carboxymethylated (CMS0.24) cassava starch derivatives were studied as corrosion inhibitors for carbon steel XC35 in a 200 mgL-1 NaCl solution. They were characterized by back titration and Fourier Transform Infrared Spectroscopy (FTIR). Electrochemical techniques were used to evaluate the inhibitive properties of starches at room temperature and the chemical composition of the protective films was determined by X-Ray Photoelectron Spectroscopy (XPS). Electrochemical measurements revealed that AS acts as mixed inhibitor, whereas CMS0.24 mainly inhibits the anodic reaction. In both cases, the protection increased with the inhibitor concentration; nevertheless, after 24 hours of immersion, the CMS0.24 loses its properties, while AS molecules still maintains them. XPS analyses show that the inhibitive films are composed of an iron oxide/hydroxide mixture in which starch molecules are incorporated. Results were explained taking into consideration the hydrophilicity and the strength of the ionic interaction of the starches with the metal surface.
publishDate 2013
dc.date.none.fl_str_mv 2013-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600001
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000126
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.16 n.6 2013
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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