Evaluation of Paullinia Cupana as a green corrosion inhibitor for carbon steel utilizing gravimetric and electrochemical noise techniques

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dc.contributor.authorFaria Neto, Antonio dos R. de [UNESP]
dc.contributor.authorSouza, Amanda P. N. de
dc.contributor.authorPassos, Raimundo R.
dc.contributor.authorPereira, Marcelo dos S. [UNESP]
dc.contributor.authorPocrifka, Leandro A.
dc.contributor.authorBrambilla de Souza, Rodrigo F.
dc.contributor.authorRios, Emerson da C.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Tecnol Fed Parana
dc.contributor.institutionUniv Fed Amazonas
dc.date.accessioned2019-10-04T12:36:54Z
dc.date.available2019-10-04T12:36:54Z
dc.date.issued2019-07-01
dc.description.abstractIn view of the damage caused by corrosion and constant concern for the environment, the antioxidant properties found in Paullinia Cupana make it possible to apply this plant as a green corrosion inhibitor. Extract of Paullinia Cupana shell was used as a green inhibitor for the inhibition of mild steel corrosion in 1.0 M HCl and 0.5 M H2SO4 solution. The corrosion performance of the extract was evaluated using gravimetric, electrochemical noise (ECN), metallographic and Fourier transform infrared spectroscopy (FTIR) analyses. The gravimetric measurements showed that Paullinia Cupana shell presents a strong inhibitive characteristic, showing an efficiency of about 76.8% and 57.4% for HCl and H2SO4 acidic mediums, respectively, and the mechanism of action is physisorption. ECN allowed to analyze the variation of the corrosion charge over time, and about 8.6 and 2.2 times less charge generated with the inhibitor was observed in HCl and H2SO4 acidic mediums, respectively, and the type of localized corrosion also decreased. Metallographic analysis showed the efficiency of the inhibitor from micrographs of the electrodes before and after the electrochemical tests. Also, FTIR analysis showed compounds being consumed in H2SO4 medium indicating that this medium oxidizes the Paullinia Cupana compounds. Therefore, the results suggest that the Paullinia Cupana extract exhibits good inhibition in HCl medium.en
dc.description.affiliationUniv Estadual Paulista, Dept Mat & Technol, Guaratingueta, SP, Brazil
dc.description.affiliationUniv Tecnol Fed Parana, Dept Mech, Curitiba, Parana, Brazil
dc.description.affiliationUniv Fed Amazonas, Dept Chem, Manaus, AM, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Mat & Technol, Guaratingueta, SP, Brazil
dc.description.sponsorshipFAPEAM
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent11
dc.identifierhttp://dx.doi.org/10.1088/2053-1591/ab13c0
dc.identifier.citationMaterials Research Express. Bristol: Iop Publishing Ltd, v. 6, n. 7, 11 p., 2019.
dc.identifier.doi10.1088/2053-1591/ab13c0
dc.identifier.issn2053-1591
dc.identifier.urihttp://hdl.handle.net/11449/185612
dc.identifier.wosWOS:000464219100002
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofMaterials Research Express
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectgreen inhibitor
dc.subjectPaullinia Cupana
dc.subjectelectrochemical noise
dc.subjectcorrosion
dc.titleEvaluation of Paullinia Cupana as a green corrosion inhibitor for carbon steel utilizing gravimetric and electrochemical noise techniquesen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd

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