1. School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China
2. State Key Laboratory of Disaster Prevention & Reduction for Power Grid,Changsha University of Science &Technology, Changsha 410114, China
Nickel based alloys are widely used in industries such as aerospace, energy,and power. However, in some highly corrosive environments, nickel based alloys will suffer severe corrosion damage. In recent years, domestic and foreign scholars have increasingly conducted in-depth research on the corrosion behavior of different types of nickel based alloys in high temperature environments. However, there is still a lack of systematic induction and summary of high temperature corrosion of nickel based alloys. Based on this,this article provides a comprehensive review of the research on high temperature corrosion of nickel based alloys, elaborating on the corrosion behavior of nickel-based alloys in different high temperature environments from four aspects: high temperature oxidation, mixed gas corrosion, hot corrosion, and other corrosion. The results show as follows. ① For some nickel based alloys, a dense oxide film is formed on the alloy surface in high temperature environments, which plays a certain protective role, but excessive temperature may cause the oxide film to rupture. ② Compared to high temperature oxidation, mixed gas corrosion is relatively complex and its harm is greater than that of a single atmosphere. ③ Due to different service environments, there are many types of hot corrosion of nickel based alloys. When the alloy contains rare earth elements, the heat and corrosion resistance is better, but the content should not be too high. ④ For porous nickel based alloys, their high temperature corrosion exhibits different characteristics, but the corrosion mechanism is currently not very clear. Based on the current research status, research focuses are proposed to further improve the high temperature corrosion performance of nickel based alloys, in order to provide scientific references for the advanced preparation and long service life of nickel based alloys.