abstract

• In 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%27s 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.
• In 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.

authors

• Díaz I.
• Escudero M.L.
• García-Alonso M.C.
• Hernández Hernández Luis Salvador
• Hernández-Alvarado L.A.
• Lomelí M.A.
• Miranda Vidales Juana María
• Narvaez Hernández Lilia

publication date

• 2014-01-01

published in

• Revista de Metalurgia  Journal

keywords

• Az31; Biomaterials; Chemical conversion coating; Corrosion; Magnesium Biological materials; Biomaterials; Chemical analysis; Coatings; Corrosion; Corrosion resistance; Fourier transform infrared spectroscopy; Magnesium; Magnesium alloys; AZ31; AZ31 magnesium alloy; Biodegradable magnesiums; Chemical conversion coatings; Chemical conversions; Magnesium substrates; Physiological solution; Potentiodynamic polarization technique; Aluminum coatings

Digital Object Identifier (DOI)

• 10.3989/revmetalm.012

start page

end page

volume

• 50

issue

• 2