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Characterization and corrosion behavior of phytic acid coatings, obtained by chemical conversion on magnesium substrates in physiological solution

AuthorsHernández-Alvarado, L. A.; Lomelí, M. A.; Hernández, L. S.; Miranda, J. M.; Narváez, L.; Díaz, Iván; García-Alonso, M. C. CSIC ORCID ; Escudero Rincón, María Lorenza CSIC ORCID
Issue Date2014
PublisherConsejo Superior de Investigaciones Científicas (España)
CitationRevista de Metalurgia 50(2): e012 (2014)
AbstractIn order to improve the corrosion resistance of biodegradable magnesium and AZ31 magnesium alloy implants, a phytic acid coating has been applied on both substrates and their protective effect against corrosion has been assessed. The morphology and the chemical nature of the conversion coating were analyzed by SEM/EDX, XRD and FTIR. The spectra showed that the conversion coating was amorphous, and it was composed of Mg, O, and P on magnesium surface, along with Al, Zn and C on AZ31 alloy. The main coating components were chelate compounds formed by phytic acid and metallic ions. The corrosion resistance of bare and coated samples was evaluated by potentiodynamic polarization technique in Hank's solution at 37 °C. The results indicate that phytic acid conversion coatings provided a very effective protection to the magnesium substrates studied. Copyright: © 2014 CSIC.
Publisher version (URL)http://dx.doi.org/10.3989/revmetalm.012
Identifiersdoi: 10.3989/revmetalm.012
issn: 1988-4222
Appears in Collections:(CENIM) Artículos
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