Corrosion protection of steel by volatile corrosion inhibitors: Vapor analysis by gas-diffusion microextraction and mass loss and electrochemical impedance in nacl deliquescence tests

dc.contributor.authorValente, Marco A.G. [UNESP]
dc.contributor.authorGonçalves, Luís M.
dc.contributor.authorFilho, Juliano Passaretti [UNESP]
dc.contributor.authorCardoso, Arnaldo A. [UNESP]
dc.contributor.authorRodrigues, José A.
dc.contributor.authorFugivara, Cecilio S. [UNESP]
dc.contributor.authorBenedetti, Assis V. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionFaculdade de Ciências da Universidade do Porto
dc.date.accessioned2021-06-25T10:36:35Z
dc.date.available2021-06-25T10:36:35Z
dc.date.issued2020-10-01
dc.description.abstractA new methodology using gas-diffusion microextraction (GDME) was developed for the analysis of volatile corrosion inhibitors (VCIs). The evaluation of the inhibition efficiency and corrosion rate (ν) was performed by NaCl deliquescence tests and correlated with measurements of polarization resistance (Rp) obtained from electrochemical impedance spectroscopy (EIS) analysis and with the pH resulting from the atmosphere of the inhibitor (pHGDME). The correlation obtained between ν and pHGDME indicates that the higher the value of pHGDME the lower the corrosion rate. The Raman spectra of steel was used to monitor in situ adsorption of VCI and the surface modifications caused by the inhibitors. The scanning electron microscopy (SEM) images corroborate the data of ν, both indicating that the cyclohexylamine vapor showed the best corrosion resistance performance.en
dc.description.affiliationDepartamento de Físico-Química Instituto de Química Universidade Estadual Paulista (Unesp)
dc.description.affiliationDepartamento de Química Fundamental Instituto de Química Universidade de São Paulo (USP)
dc.description.affiliationREQUIMTE/LAQV Departamento de Química e Bioquímica Faculdade de Ciências da Universidade do Porto
dc.description.affiliationDepartamento de Química Analítica Instituto de Química Universidade Estadual Paulista (Unesp)
dc.description.affiliationUnespDepartamento de Físico-Química Instituto de Química Universidade Estadual Paulista (Unesp)
dc.description.affiliationUnespDepartamento de Química Analítica Instituto de Química Universidade Estadual Paulista (Unesp)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2018/14425-7
dc.format.extent2038-2048
dc.identifierhttp://dx.doi.org/10.21577/0103-5053.20200104
dc.identifier.citationJournal of the Brazilian Chemical Society, v. 31, n. 10, p. 2038-2048, 2020.
dc.identifier.doi10.21577/0103-5053.20200104
dc.identifier.fileS0103-50532020001002038.pdf
dc.identifier.issn1678-4790
dc.identifier.issn0103-5053
dc.identifier.scieloS0103-50532020001002038
dc.identifier.scopus2-s2.0-85092748639
dc.identifier.urihttp://hdl.handle.net/11449/206693
dc.language.isoeng
dc.relation.ispartofJournal of the Brazilian Chemical Society
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCorrosion
dc.subjectDerivatization
dc.subjectSteel
dc.subjectVapor phase inhibitors
dc.subjectVolatile corrosion inhibitors
dc.titleCorrosion protection of steel by volatile corrosion inhibitors: Vapor analysis by gas-diffusion microextraction and mass loss and electrochemical impedance in nacl deliquescence testsen
dc.typeArtigo

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