Formation of a phosphate conversion coating on bioresorbable Mg-based metallic glasses and its effect on corrosion performance
| Autor: | Nick Birbilis, David M. Miskovic, Kevin J. Laws, Katharina Pohl, Michael Ferry |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Amorphous metal General Chemical Engineering Simulated body fluid Metallurgy 02 engineering and technology General Chemistry Substrate (electronics) engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Phosphate conversion coating 0104 chemical sciences Corrosion Anode Coating engineering General Materials Science Composite material 0210 nano-technology Ternary operation |
| Zdroj: | Corrosion Science. 129:214-225 |
| ISSN: | 0010-938X |
| Popis: | Ternary Mg-Zn-Ca metallic glasses show promise as a bioresorbable implant material. Their susceptibility to relatively rapid corrosion rates, however, requires new ways to reduce their initial rate of corrosion post-implantation. To this end, the application of a simple phosphate conversion coating was studied on Mg 66 Zn 30 Ca 4 to determine the metallic glasses impact on coating development. A model for coating growth is proposed. The results demonstrate corrosion resistance can be improved by an order of magnitude in simulated body fluid, with a significant reduction in anodic kinetics. Furthermore, the mechanical reliability under a compressive load is improved two-fold, despite substrate relaxation due to coating. |
| Databáze: | OpenAIRE |
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