Recent advances on the oxide film of ignition-proof magnesium alloys: A review

Magnesium and its alloys offer lightweight advantage and have extensive development prospects, particularly in aerospace. However, their flammability poses a significant barrier on the development of Mg alloys. The ignition resistance of these alloys often depends on the protectiveness of the oxide film formed on the surface. This paper elucidates the formation mechanism of oxide film from thermodynamics and kinetics, classifying oxide films based on their layered structure to assess their protective properties. Furthermore, it comprehensively reviews the impact of characteristics on the protective effectiveness such as compactness, continuity, thickness, and mechanical properties. The paper also introduces various characterization methods for the microstructure and properties of oxide film. The primary objective of this paper is to enhance the comprehension of oxide film concerning the ignition resistance of Mg alloys and to furnish references for future advancements and research in Mg alloys with heightened ignition resistance.