Which metals have the best corrosion resistance in liquid sodium?

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Combined with the previous background on the corrosion of solid metal materials in liquid sodium, metals and alloys with excellent corrosion resistance in liquid sodium are currently mainly divided into the following categories:: 1. High corrosion resistance pure metals chromium, molybdenum and tungsten: It can still maintain a certain degree of corrosion resistance in a liquid sodium environment of 1500°C, and is a pure metal material with an extremely high temperature resistance limit. Iron, cobalt, nickel, niobium, tantalum: In liquid sodium with a temperature below 900°C, it has excellent corrosion resistance and a very low dissolution rate. 2. Corrosion-resistant alloy and stainless steel OCr17Ni14Mo2 stainless steel: It can stably maintain corrosion resistance in a liquid sodium environment of 800°C and is a commonly used supporting material for sodium-cooled fast neutron reactors. Austenitic stainless steel: It can withstand liquid sodium corrosion at 600°C and is widely used in sodium system equipment and pipelines in the nuclear industry. Nickel/cobalt based alloy: Such as Incone alloy, Hastelloy alloy, etc., which can be used stably for a long time in high-temperature liquid sodium, and their corrosion resistance is better than ordinary carbon steel.