| Full text | |
| Author(s): |
Verissimo, Nathalia C.
;
Freitas, Emmanuelle S.
;
Cheung, Noe
;
Garcia, Amauri
;
Osorio, Wislei R.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of Alloys and Compounds; v. 723, p. 649-660, NOV 5 2017. |
| Web of Science Citations: | 16 |
| Abstract | |
Biodegradable implants can be used in order to avoid removal surgery. Mg-Zn alloys are considered interesting alternatives for biomedical applications, however, studies concerning the effects of microstructural features in the as-solidified condition and segregation aspects on the resulting electrochemical behavior are scarce. This investigation is focused on the evaluation of the electrochemical corrosion of an as-solidified Mg-25 wt.% Zn alloy in a 0.15 M NaCl solution at 25 degrees C. EIS plots, potentiodynamic polarization curves and equivalent circuits are used. It is shown that Zn segregation affects both the galvanic couple and the cathode-to-anode area ratio. It was found that finer and homogeneously distributed Mg-rich six-fold branched equiaxed dendritic grains induce lower corrosion current density and higher polarization resistance when compared with equivalent results of coarser ones. (C) 2017 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 13/23396-7 - Effects of solidification MicrostructureParameters of Aluminum-based multicomponent alloys (Al-Mg-Si; Al-Sn-Cu; Al-Zn-Mg) on the resistances to Corrosionand tribocorrosion degradation |
| Grantee: | Amauri Garcia |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 14/50502-5 - Interrelation of thermal and microstructural solidification parameters and corrosion/tribocorrosion behavior of alloys for tribological, biomedical and solder applications |
| Grantee: | Amauri Garcia |
| Support Opportunities: | Regular Research Grants |