Aiming at the compatibility problem of high-temperature flowing liquid metal on structural materials,especially the corrosion problem,in the first wall of liquid lithium and liquid metal blanket components in the nuclear fusion reactor,a high-temperature flowing liquid metal corrosion experimental device is designed,and three-dimensional numerical simulation and analysis of the flow and heat transfer characteristics of the liquid metal are carried out by using the software ANSYS.The simulation and test results show that the experimental device can realize the conditions of liquid lithium temperature(300-600℃)and flow rate(<0.2 m/s)in the first wall and blanket structure,and is qualified to study the corrosion characteristics of dynamic liquid lithium and structural materials at high temperature.Meanwhile,the corrosion behavior of domestically produced low-activation ferrite/martensite steel(9Cr-0.4Mo-0.3Y steel)in 0.2 m/s liquid Li at 550℃for 1000 hours(h)is preliminarily studied.The results show that 9Cr-0.4Mo-0.3Y steel experiences obvious intergranular corrosion and pitting corrosion,and the surface hardness of the sample is reduced to different degrees due to non-uniform corrosion.The XRD analysis reveals that there is no phase transformation on the corroded surface of 9Cr-0.4Mo-0.3Y steel.The 03-1049#FeNi peak is detected on the sample'surface due to the dissolution and migration of Ni element from the 304 stainless steel vessel.
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