Abstract
The degradation behavior of a MAO-AZ91D with a calcium phosphate/chitosan composite coating in the modified simulated human body fluid (m-SBF) was investigated by immersion experiments and electrochemical impedance spectroscopy. The compositions of the composite coating soaked in the m-SBF for different time intervals were studied by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, thermo-gravimetric analysis and differential thermal analysis. The microstructures of the composite coating at different soaking stages were observed by using a scanning electron microscope. Results show that the as-prepared composite coating could slow down the corrosion rate of the AZ91D alloy and it demonstrated good bioactivity in the m-SBF. The coating's morphology changed from a flake-like one into a spherical-shaped one with the increase of immersion time in the m-SBF.
| Original language | English |
|---|---|
| Pages (from-to) | 179-187 |
| Number of pages | 9 |
| Journal | Colloids and Surfaces B: Biointerfaces |
| Volume | 111 |
| DOIs | |
| State | Published - 1 Nov 2013 |
| Externally published | Yes |
Keywords
- Bioactivity
- Calcium phosphate coating
- Chitosan
- Degradable behavior
- Mg alloy
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