|About this Abstract
||Materials Science & Technology 2020
||Next Generation Biomaterials
||Corrosion Modelling of Coated Pure Magnesium Towards Degradation-Controlled Bone Fixation Implants
||Moataz Abdalla, Hamdy Ibrahim
|On-Site Speaker (Planned)
Biodegradable metals have been under research as alternatives to the currently-in-use non-biodegradable materials for medical implants. Considerable research was done to develop numerical models towards an inexpensive and fast designing tool to assess the change of the implant’s geometry and mechanical strength during degradation. However, the effect of coating was not investigated before in the literature in terms of modeling the corrosion behavior. The model developed in this study is capable of simulating the corrosion behavior of implants made of pure magnesium coated with a ceramic coating prepared by the micro arc oxidation coating processes. The saturation limit of magnesium ions was measured experimentally under conditions simulating the human body. Diffusivity of magnesium ions were experimentally calibrated inside a simulated body fluid for uncoated and coated pure magnesium samples using a 2D finite element model. The developed model can then be scaled up and tested for bulk and 3D-printed parts.