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dc.title Electrochemical analysis of the ASTM F75 alloy at different pH values and temperatures en
dc.type Artículo es
dcterms.abstract The electrochemical behavior of ASTM F75 alloy was analyzed in a sodium chloride solution at pH values of 5, 7, and 9 and temperatures of 37 and 42 °C. The tests were performed in samples corresponding to two different regions of a hip prosthesis. Polarization curves showed that as pH increased the passivity range decreased. However, according to the complementary potentiodynamic–potentiostatic– potentiodynamic technique performed, the increase in the anodic current density was due to a change in the chromium oxidation state from Cr+3 to Cr+6 to form CrO4 −2, and not to localized corrosion. On the other hand, neither the microstructure nor the temperature had influence on the electrochemical response ofASTMF75. The electrochemical impedance spectroscopy test showed that as pH increased, the passive film became more compact and thicker. However, its resistance decreased and the electrical double layer became more disordered, promoting diffusion processes of charged species. These results are in agreement with those obtained in the polarization curves, which showed an increase in the dissolution of the passive film, caused by the change in the chromium oxidation state, as pH increased. en
dcterms.extent p. 977-987 es
dcterms.issued 2017-09
dcterms.language Inglés es
dcterms.license Attribution-NonCommercial-NoDerivatives 4.0 International (BY-NC-ND 4.0) es
dcterms.publisher Wiley es
dcterms.subject ASTM F75 en
dcterms.subject biomaterials en
dcterms.subject corrosion en
dcterms.subject pH en
dcterms.subject temperature en
cic.version info:eu-repo/semantics/publishedVersion es Kociubczyk, Alex Iván es Méndez, Claudia Marcela es Gregorutti, Ricardo Walter es Ares, Alicia Esther es
cic.lugarDesarrollo Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica es
dcterms.subject.materia Ingeniería de los Materiales es
dcterms.identifier.url Recurso online es
dcterms.identifier.other doi:10.1002/maco.201609394 es
dcterms.isPartOf.issue vol. 68, no. 9 es
dcterms.isPartOf.series Materials and Corrosion es
cic.isPeerReviewed true es
cic.isFulltext true es


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