Research Progress on Corrosion Behavior of Magnesium Alloy Composites in Practical Service Conditions

Abstract Magnesium alloys, due to their exceptional mechanical properties, biocompatibility, and biodegradability, are recognized as revolutionary biodegradable metallic materials in orthopedic applications, significantly superior to conventional metallic and composite biomaterials. However, their excessively rapid corrosion rate in physiological environments remains a critical challenge, leading to premature loss of mechanical integrity and inducing adverse biological reactions, which significantly hinders clinical and industrial applications. This review systematically investigates the corrosion mechanisms of magnesium alloys and summarizes advanced strategies for achieving controllable degradation, including surface modification, alloy composition optimization, and additive manufacturing technologies. A comparative analysis evaluates magnesium alloys against clinically established materials (e.g., titanium alloys, stainless steel, and Co–Cr alloys). Critically, this work highlights the bidirectional modulation of degradation kinetics in emerging applications: suppressing corrosion in biomedical implants and accelerating corrosion in energy/environmental systems. These findings provide a comprehensive framework to guide the development of high‐performance magnesium alloys with tailored degradation profiles across interdisciplinary fields.