快中子反应堆(FBR)乏燃料处理产生的放射性氯化物废盐渣需经玻璃陶瓷固化处理来减少对环境的危害。针对废盐渣固化体系中熔融氯化物与玻璃介质的强腐蚀特性，本工作采用SEM、XRD、EPMA等手段系统研究了Inconel 690、Inconel625和310S合金在同时含有熔融氯化物和熔融玻璃的废盐渣玻璃陶瓷固化环境中的腐蚀行为，为废盐渣陶瓷固化反应容器材料的选用和成分优化提供相关依据。结果表明，Inconel 690合金在该环境下由于Cr的选择性扩散形成了Cr₂O₃，在氯化物的作用下Cr₂O₃疏松并发生脱落，暴露了贫Cr基体后在表面新形成了NiO和NiCr₂O₄。Inconel 625基体中沿晶分布的δ-Ni₃Nb相和腐蚀过程中与之相关的微观组织演变导致了合金外部Cr₂O₃/富Nb氧化物双层膜结构的形成，并使合金表现出强烈的沿晶腐蚀倾向。310S合金的基体元素Fe易与腐蚀介质中的氯反应生成低沸点氯化物并通过疏松的Cr₂O₃层挥发后形成Fe₂O₃。此外，合金的表层基体在失去大量Cr的Fe后发生了Ni的相对富集，并在流动性介质的作用下发生剥落，进一步在Cr₂O₃外层被氧化生成NiO和NiFe₂O₄。当熔融氯化物与玻璃共存时，合金腐蚀主要由Cr选择性扩散引发贫Cr层及Kirkendall空洞使基体组织发生退化。氯化物主导了合金的腐蚀过程，通过引发沿晶腐蚀以及对Cr₂O₃的溶解和与Cr的反应加剧Cr的脱合金化。熔融玻璃则主要是通过物理作用影响表层产物形态来间接影响合金的耐腐蚀性能。

In the glass-ceramic solidification of waste salt slag reaction environment contains both strongly corrosive molten chlorides and molten glass binders, investigating the corrosion behavior of alloys in this environment is crucial for the selection of materials used in the ceramic curing of waste salt slag reaction canister and composition optimization. This study focuses on the corrosion resistance behavior and mechanism of three typical corrosion-resistant alloys, Inconel 690, Inconel 625 and 310S, during the glass-ceramic solidification process of waste salt slag. The results show that selective diffusion of Cr occurs in all three alloys during the corrosion process, generating a large number of Kirkendall cavities within the alloy matrix. The presence of molten chlorides reacts with Cr2O3 as well as with elemental Cr, further exacerbating the process of Cr dealloying. The corrosion products of Inconel 690 in this environment are predominantly Cr2O3, and the alloy shows the lowest dimension loss, but also the most severe internal corrosion caused by selective diffusion of Cr due to its highest Cr content. For Inconel 625, the diffusion of Cr in the alloy is significantly inhibited and the degree of internal corrosion is less severe due to the lattice distortion caused by the solid solution of Mo and Nb in the alloy, which hinders lattice diffusion. However, as the final oxidation product of Mo, MoO3 has a low melting point and is volatile, leading to matrix fracture and oxide layer shedding and a resultant increased dimension loss of Inconel 625. The base element of 310S, namely Fe, is prone to react with chlorine and oxygen to produce Fe2O3, and the large participation of the base element in the reaction leads to a high dimension loss of the alloy, which is particularly noticeable in the atmosphere region environment rich in oxygen and chlorine vapour.