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液态铅铋合金(LBE)是一种性能优异的材料,在加速驱动系统(ADS)中作为散裂靶和冷却剂材料。然而,在ADS中,贮存LBE的容器和结构钢材料在高温下与LBE直接接触时会被严重腐蚀。本文研究该腐蚀和金属Cr、Ni减轻该腐蚀的机制。研究发现,铁在LBE中被腐蚀的微观机制是由于铁原子与LBE原子相互渗透,破坏了铁材料结构;铁中掺入Cr、Ni可以有效减轻铁的腐蚀,其微观机理为金属Cr、Ni加入到铁后阻止了LBE原子渗入铁材料中破坏其结构。
Liquid lead-bismuth alloy (LBE) is a high-performance material used as a spatter target and coolant material in an Acceleration Drive System (ADS). However, in ADS, containers and structural steels storing LBE are severely corroded when in direct contact with LBE at high temperatures. This paper studies the corrosion and metal Cr, Ni mitigation mechanism of the corrosion. It is found that the micro-mechanism of corrosion of iron in LBE is due to the mutual infiltration of iron atoms and LBE atoms, which destroys the structure of iron materials. The incorporation of Cr and Ni into iron can effectively reduce the corrosion of iron. The microscopic mechanism is Cr, Ni The addition of iron prevents the LBE atoms from penetrating into the iron material and destroying its structure.