低温熔盐中钛铝合金电解脱铝的研究  

Study on electrical removal of aluminum from Ti-Al alloys in low-temperature molten salt

作　　者：徐培栋 谭敏 李涛 高爱民 辛朝阳 刘伟 谷少鹏 Xu Peidong;Tan Min;Li Tao;Gao Aimin;Xin Zhaoyang;Liu Wei;Gu Shaopeng(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《钢铁钒钛》2023年第4期78-84,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金面上项目(No.52074056);唐山市科技创新团队培养计划项目(21130209D);唐山市科技计划项目(22130222H)。

摘　　要：为实现钛铝合金的二次回收与分离利用,以钛铝合金为牺牲阳极,1-丁基-3-甲基咪唑氯铝酸盐(BMIC-Al-Cl_(3))作为电解液,进行钛铝合金的脱合金化研究。采用循环伏安曲线、动电位极化和恒电位极化对电解过程的脱合金行为进行电化学分析;使用SEM对电解前后样品微区形貌进行表征,使用ICP-AES对电解前后钛铝合金样品中的Al含量进行定量分析。结果表明,钛铝合金在BMIC-AlCl_(3)中的脱合金反应为准可逆反应,且长时间电解过程中电流保持稳定,可实现持续电解脱铝;通过扫描电子显微镜发现阴极沉积层为纯度较高且呈现多孔结构的金属铝。ICP-AES对电解前后的钛铝合金中Al元素含量的分析结果表明,电解后钛铝合金中Al元素含量相对于电解前下降10.67%。In order to realize the secondary recycling and separation of Al-Ti alloys,the dealloying of Al-Ti alloys was studied with 1-butyl-3-methyl imidazolium chloride(BMIC)-aluminum chloride(Al-Cl_(3))as the electrolyte and Ti-Al alloys as the sacrificial anode.Cyclic voltammetry,potentiodynamic polarization method,and potentiostatic polarization method were performed to analyze the dealloying behavior during electrolysis.SEM-EDS was used to characterize the micromorphology of the samples before and after electrolysis.The Al content in the Ti-Al alloy samples was quantified by ICP-AES.The results showed that the dealloying reaction of Ti-Al alloy in BMIC-AlCl_(3)is quasi-reversible.The current remains stable during the long-time electrolysis,indicating that the electrolytic dealloying could be achieved continuously.The cathodic deposition layer was found to be metallic aluminum with high purity and porous structure by scanning electron microscopy.The content of Al in titanium aluminum alloy after electrolysis decreased by 10.67%compared with that before electrolysis based on the ICP-AES analysis.

关 键 词：钛铝合金 离子液体 脱合金化 电化学分析 铝含量 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TQ151[金属学及工艺—金属材料]