Performance Testing, Corrosion Behavior, and Corrosion Product Analysis of Cast Magnesium and Its Alloys

ABSTRACT To investigate the biocompatibility of magnesium and its alloys, this study examines surface bubble changes and corrosion product formation in cast Mg, Mg‐0.8Ca, and Mg‐2.0Zn‐1.6Ca under 37°C simulated body fluid. Corrosion products on pure magnesium surfaces protect the substrate and lower corrosion rates. A 1‐week in vitro immersion test confirmed that corrosion products from all three materials are harmless to the human body. Electrochemical experiments align with in vitro findings, showing pure Mg has the best corrosion resistance, while Mg‐2.0Zn‐1.6Ca has the poorest. Tensile and bending tests reveal that alloying improves the mechanical properties of magnesium alloys. These results have significant scientific and practical value for advancing magnesium alloys in biomedicine, optimizing material design, and enhancing performance.