This study focuses on the evaluation of mechanical and corrosion properties of selected magnesium alloys (AZ31, AZ63, AZ91 and AE21) and commercially pure magnesium in a simulated human body environment. The aim of the work was to compare the behaviour of these materials under conditions relevant to biomedical applications. The materials were subjected to mechanical testing and corrosion analysis using electrochemical methods in a simulated body fluid. The results showed that the AZ91 alloy achieved the highest mean hardness (61.1 ± 1.88 HV) and exhibited the most favourable electrochemical corrosion behaviour, as indicated by the lowest corrosion current density (7.041 mA/cm²) and calculated corrosion rate (0.161 mm/year). These findings suggest that AZ91 is a promising candidate for applications requiring improved mechanical strength and corrosion performance in physiological conditions. The main contribution of this study is the direct experimental comparison of the Vickers hardness and electrochemical corrosion behaviour of commercially pure magnesium and four magnesium alloys (AZ31, AZ63, AZ91, and AE21) under identical experimental conditions, providing a consistent basis for evaluating the influence of alloy composition on their performance in a simulated physiological environment.

Magnesium alloys, Corrosion, Mechanical properties, Simulated body environment

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