Influence of Initial Orientation and MAO Coating on SCC Susceptibility of Magnesium Alloy in Simulated Body Fluid with Acid Environments

The study focuses on the influence of initial orientation and MAO coating on the stress corrosion cracking (SCC) susceptibility of magnesium alloys in simulated body fluid with acidic environments. Magnesium alloys are ideal for bioimplants due to their degradability, biocompatibility, and mechanical strength, but they face challenges such as accelerated degradation and stress corrosion cracking. The authors used MAO treatment to prepare a bioactive nano-coating on magnesium alloy samples and studied their static and dynamic corrosion behavior in acidic SBF. The research highlights the significant effect of initial orientation on the fatigue behavior and life of magnesium alloys, as well as the improved corrosion resistance provided by MAO coating. The study also investigates the stress corrosion mechanism and the role of texture and coating in enhancing the material's resistance to corrosion, making it a valuable contribution to the field of biomedical materials science.