Mg-Gd和Mg-Y系高强稀土镁合金腐蚀与防护研究进展

Research Progress of Corrosion and Protection of Mg-Gd and Mg-Y Series High Strength Rare Earth Magnesium Alloys

Mg-Gd和Mg-Y系高强稀土镁合金具有优异的力学性能和高温性能,广泛应用于航空航天、汽车工业等领域,但如何提高其耐腐蚀性能一直是亟需解决的问题。本文梳理了Mg-Gd和Mg-Y系高强稀土镁合金关于腐蚀行为研究的相关文献,阐明了腐蚀机制,并从材料自身和表面改性两方面提出了提高其耐腐蚀性能的方法。最后通过第一性原理等方面的研究,对未来新型耐蚀Mg-Gd、Mg-Y系合金的设计开发进行了展望。

Mg-Gd and Mg-Y series high-strength rare earth magnesium alloys are widely used in aerospace,automotive industries and other fields because of their excellent mechanical properties and high temperature properties.However,how to improve their corrosion resistance is an urgent problem to be solved.The relevant literatures on the corrosion behavior of Mg-Gd and Mg-Y high-strength rare earth magnesium alloys are summarized in this paper,and the corresponding corrosion mechanism is clarified.The methods of improving the corrosion resistance of the material are proposed from both the interior and surface modification aspects.Finally,the design and development of new corrosion resistant Mg-Gd and Mg-Y series alloys in the future are prospected through the research progress of first-principles calculations.