1. School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China
2. Engineering Research Center of High-Entropy Alloy Materials, Dalian 116024, China
The unique composition design and interaction among multi-component elements of high-entropy alloys (HEAs) make HEAs possess many special physical, chemical and mechanical properties, such as better corrosion resistance than traditional alloys in various corrosive media, HEAs show great application potential in modern industry and high-tech fields. In this review, we start with the influence of HEAs composition, preparation method, and thermomechanical treatment process on grain size, element distribution, phase structure, and crystal defects. Then, we clarify the reasons for the difference between composition, formation process, and stability of passive film on HEAs in corrosive media. Furthermore, we sort out the corrosion form, corrosion product, and corrosion mechanism, in order to accurately evaluate the corrosion resistance of HEAs. Finally, the challenges faced in the process of breaking the application limitations of traditional alloys, overcoming the “technology choke points” problem in extreme service environments,developing high-strength, ductility, and corrosion-resistant high-entropy alloys, and promoting the industrial application of HEAs are summarized and prospected