纯镍渗硼在熔融LiCl-Li_2O中的腐蚀行为  

The corrosion behavior of boronized pure nickel in the molten LiCl-Li_2O

作　　者：刘瑞岩[1] 王旭[1] 张俊善[1] 王秀敏[1] 高路斯[1] 祝美丽[1] 

机构地区：[1]大连理工大学材料工程系,大连116023

出　　处：《核技术》2004年第9期716-720,共5页Nuclear Techniques

摘　　要：采用固体粉末包装法在950℃渗硼5h,在纯镍表面制备了厚度约50μm致密连续的渗硼涂层。采用浸没法研究了纯镍及纯镍渗硼涂层在750℃空气及熔融LiCl-10Li2O(Li2O质量分数为10%)中的腐蚀行为。渗硼涂层试样的腐蚀失重为8.4mg·cm-2,只有原始纯镍试样的1/4。渗硼涂层明显改善了纯镍在熔融LiCl-Li2O中的耐腐蚀性能,这归因于渗硼涂层中的硼元素在熔融LiCl-Li2O中的优先腐蚀抑制了镍的加速腐蚀。The pack boronizing process has been used to treat pure nickel at a temperature of 950℃ for a boronizing time of 5 h. A dense and continuous boronized layer of 50 μm thick was obtained on pure nickel. This paper describes the corrosion of pure nickel and the boronized nickel in molten LiCl-10Li2O (the mass fraction of Li2O is 10%) at 750℃ under air by immersion experiments. The weight loss of the boronized coating was 8.4 mg·cm-2, about three times lower than that of unboronized pure nickel. The preferential corrosion of B in boronized layer effectively prevented the corrosion of nickel, thus improving the corrosion resistance of pure nickel in molten LiCl-Li2O.

关 键 词：纯镍 渗硼 熔融LiCl-Li2O腐蚀 

分 类 号：TG172.6[金属学及工艺—金属表面处理]