钛合金在硼、锂介质中的缝隙腐蚀行为分析  

Analysis of Crevice Corrosion behavior of Titanium Alloy in Boron and Lithium Media

作　　者：赵宇翔[1] 徐祺[1] 熊茹[1] 郭相龙[2] 刘肖[1] Zhao Yuxiang;Xu Qi;Xiong Ru;Guo Xianglong;Liu Xiao(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Shanghai Jiaotong University,Shanghai,200240,China)

机构地区：[1]中国核动力研究设计院反应堆燃料及材料重点实验室,成都610213 [2]上海交通大学,上海200240

出　　处：《核动力工程》2023年第S01期152-157,共6页Nuclear Power Engineering

基　　金：国防科工局重点实验室稳定支持计划项目(K909001201804)。

摘　　要：钛合金作为新型蒸汽发生器的主要结构材料,其耐缝隙腐蚀性能受到关注,而钛合金在硼、锂介质中的缝隙腐蚀行为研究较少。本文采用微型腐蚀回路对钛合金TA16和TA17在硼、锂介质中的5000 h缝隙腐蚀行为进行了研究,获得了2种材料的缝隙腐蚀敏感性,并对试验后钛合金氧化膜成分和结构进行了分析。结果表明:在缝隙腐蚀模拟件上未观察到缝隙腐蚀现象,TA16、TA17在硼、锂介质中对缝隙腐蚀不敏感;模拟件缝隙内、外的氧化物存在一定差异,缝隙外的颗粒状微晶钛铁矿(FeTiO_(3))与钛合金缝隙腐蚀无关。As the main structural material of new steam generator(SG),the crevice corrosion behavior of titanium alloy has been concerned.However,the crevice corrosion resistance of titanium alloy in boron and lithium media is less studied.In this paper,the crevice corrosion behavior of titanium alloys TA16 and TA17 in boron and lithium media for 5000 h was studied by means of micro corrosion loop.The crevice corrosion sensitivity of the two materials was obtained,and the composition and structure of the oxide film of titanium alloys were analyzed.The results show that no crevice corrosion is observed on the sample,which indicates that TA16 and TA17 are insensitive to crevice corrosion in boron and lithium media.There are some differences between the oxides inside and outside the crevice of titanium alloys,and the granular microcrystal FeTiO_(3) outside the crevice is independent of crevice corrosion of titanium alloy.

关 键 词：钛合金 硼、锂介质 缝隙 腐蚀 氧化物 

分 类 号：TL341[核科学技术—核技术及应用]