Assessment of Charge Transport through Barrier Membranes before Application on Materials Surfaces

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dc.contributor.authorNardeli, Jéssica Verger [UNESP]
dc.contributor.authorFugivara, Cecílio Sadao [UNESP]
dc.contributor.authorBenedetti, Assis Vicente [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T14:52:05Z
dc.date.available2023-07-29T14:52:05Z
dc.date.issued2022-01-01
dc.description.abstractThis work aims at investigating the charge transfer resistance (RCT) of the two membranes derived from vegetable oils which are intended to protect materials against corrosion. The membranes were characterized by thickness measurement (328±1 μm and 491± 1 μm), atomic force microscopy (AFM) to estimate of roughness (<0.5 μm), Raman spectroscopy while the RCT values were evaluated by electrochemical impedance spectroscopy (EIS) in 0.1 mol/L KCl solution. EIS was used to measure the impedance at low frequency (Z0.01Hz ≅ 109 Ω cm2), RCT ≅ 109 Ω cm2 and exchange current density (i0 ≅ 10-11 Ω cm2), employing simple instrumentation. The thickness of the membrane must be considered for coherent interpretation of the impedance results. The study of electrolytes permeation in membranes is important to previously estimate the lifetime offered to a substrate over the time of immersion even before being applied to the metallic surface. The impedance measurements demonstrated that the most resistant membrane to permeation presented a RCT around 2 GΩ cm2. This EIS measurements approach enables the optimization of membrane fabrication by conveniently identifying the best formulation.en
dc.description.affiliationUniversidade Estadual Paulista Instituto de Química, SP
dc.description.affiliationUnespUniversidade Estadual Paulista Instituto de Química, SP
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2022-0129
dc.identifier.citationMaterials Research, v. 25.
dc.identifier.doi10.1590/1980-5373-MR-2022-0129
dc.identifier.issn1980-5373
dc.identifier.issn1516-1439
dc.identifier.scopus2-s2.0-85139768153
dc.identifier.urihttp://hdl.handle.net/11449/249253
dc.language.isoeng
dc.relation.ispartofMaterials Research
dc.sourceScopus
dc.subjectcorrosion protection
dc.subjectMembrane
dc.subjectpermeation
dc.subjectpristine organic film
dc.titleAssessment of Charge Transport through Barrier Membranes before Application on Materials Surfacesen
dc.typeArtigo

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