Influence of β Phase on Corrosion Behavior of Mg-Al-Zn Alloys

OpenAlex İngilizce

There are numerous studies to understand the corrosion behaviors of AZ series Mg alloys and the results on the role of β phase in the corrosion of the AZ series Mg alloys are yet contradictory.In the literature, the β phase inhibits the corrosion by barrier effect or vice versa promotes corrosion by micro galvanic coupling.This review focuses on the influence of microalloying elements and the solidification rate on the β phase morphology, affecting the corrosion behavior of AZ series Mg alloys.Additionally, the oxide film-β phase relationship on the surface of the alloys also has been evaluated on their corrosion properties.The review showed that the contradictory evaluations of the researchers about why the β phase prevents corrosion with the barrier effect or vice versa, why the β phase increases corrosion with micro galvanic coupling, attributed to variations in the production methods and related β phase morphology in microstructure.