熔盐液面上钨阴极快速腐蚀研究  

Rapid Corrosion of Tungsten Cathode Above Molten Salt

作　　者：薛娟琴[1] 郭忠源[1] 唐长斌[1] 毕强[1] 张桀[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《热加工工艺》2015年第2期88-92,共5页Hot Working Technology

摘　　要：稀土氧化物熔盐电解过程中钨阴极的局部快速损失是困扰生产的现实紧迫问题,为了揭示其腐蚀原因,针对稀土熔盐电解过程中钨阴极的消耗进行现场调研,进行了热力学理论分析并通过所设计的高温包埋试验、质量分析、XRD测试,以及工业现场钨阴极腐蚀形态的SEM观察,得出钨阴极高温腐蚀的原因在于稀土氧化物熔盐电解质挥发物附着在钨阴极表面加速其高温氧化破坏而引发其过快热腐蚀所致。The rapid loss of tungsten cathode in rare earth （RE） molten salt electrolysis is urgent problem, which plagues the production. By using thermodynamics theory analysis and design of high-temperature-embedded test, gravimetric analysis, XRD test, and SEM observation on industrial corrosion morphology of tungsten cathode, the consumption of tungsten cathode in RE molten salt electrolysis and reveal causes of corrosion were studied. The results show that because volatized RE molten salt attached to the surface of tungsten cathode, the triggered high-temperature oxidation becomes hot corrosion damage with relatively fast rate.

关 键 词：熔盐电解 钨阴极 热腐蚀 氧化 

分 类 号：TG113.231[金属学及工艺—物理冶金]