Biocompatible Mg-Zn-Ca alloys are an attractive candidate for biodegradable implant applications. However, it is necessary to consider the corrosion aspects of such alloys in properly simulated conditions to optimise and avoid their rapid degradation inside the human body. Corrosion of magnesium alloys can depend on metallurgical factors such as alloy composition, impurity content, grain size, texture, the presence of intermetallics and precipitates, and their shape and size. The in-vivo environmental factors such as the presence of proteins, temperature, pH, and flow need to be taken into account for an accurate determination of the corrosion rate of such biocompatible alloys in the human body. In the present investigation, the corrosion behaviour of an extruded, lean magnesium alloy, Mg-1wt%Zn-0.3wt%Ca (denominated as ZX10), was investigated in simulated human physiological conditions in the presence of both inorganic and organic constituents. Potentiodynamic polarization tests and electrochemical impedance spectroscopy were performed to investigate corrosion of the alloy in a typical Hank's solution, Hank's solution + albumin, and Hank's solution + albumin + glucose. The presence of albumin and Hank's solution + albumin + glucose was found to decrease the alloy's corrosion resistance.
|Number of pages||9|
|Publication status||Published - 2020|
|Event||Australasian Corrosion Association (ACA) Conference 2019 - Melbourne, Australia|
Duration: 24 Nov 2019 → 27 Nov 2019
|Conference||Australasian Corrosion Association (ACA) Conference 2019|
|Period||24/11/19 → 27/11/19|
- Lean Mg alloy