稀土La对精铸Cu-Ni-Fe-Al合金组织和电解性能的影响  

Influence of La on Microstructure and Electrolysis Performance of Cu-Ni-Fe-Al Alloy by Investment Casting

作　　者：张鹏元 刘哲 刘子涵 李子豪 曹欣奕 王琛 刘英 Zhang Pengyuan;Liu Zhe;Liu Zihan;Li Zihao;Cao Xinyi;Wang Chen;Liu Ying(School of Material Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018;Hebei Key Laboratory of Material Near-Net Forming Technology,Shijiazhuang 050018)

机构地区：[1]河北科技大学材料科学与工程学院,石家庄050018 [2]河北省材料近净成形技术重点实验室,石家庄050018

出　　处：《特种铸造及有色合金》2024年第2期271-276,共6页Special Casting & Nonferrous Alloys

基　　金：河北省自然科学基金资助项目(E2021208005)。

摘　　要：针对Cu-Ni-Fe合金惰性阳极在铝电解过程中高温氧化和耐腐蚀性能差等问题,采用真空熔炼法制备了Cu-Ni-Fe-8Al合金,同时制备了不同La含量的Cu-Ni-Fe-8Al-xLa(x=0,1,2,质量分数)合金,研究了Al、La的添加对Cu-Ni-Fe合金微观组织结构及电解腐蚀性能的影响。结果表明,添加Al元素后,合金在高温电解过程中形成铝酸盐,抑制了Cu的外扩散;添加稀土La提高了氧化膜层与基体的结合性,进一步降低阳极材料的腐蚀损耗,但过高的La添加在一定程度上加速了合金的腐蚀。因此,添加适量Al和微量稀土La的Cu-Ni-Fe-8Al-La合金有望成为惰性阳极铝电解用备选阳极材料。In order to solve the problems of high temperature oxidation and poor corrosion resistance of the inert anode of Cu-Ni-Fe alloy during the process of aluminum electrolysis,Cu-Ni-Fe-8Al alloy was fabricated by vacuum smelting method.Moreover,Cu-Ni-Fe-8Al-xLa(x=0、1 and 2)alloys with different La contents were prepared,and the effect of La addition on microstructure and electrolytic corrosion performance of Cu-Ni-Fe-8Al alloy were investigated.The results indicate that aluminate is formed during the process of high temperature electrolysis after Al addion,inhibiting the external diffusion of Cu.The addition of rare earth La enhances the associativity between oxide film and matrix,further reducing the corrosion loss of anode material,while excessive addition of La can accelerate the corrosion of Cu-Ni-Fe alloy to a certain degree.Therefore,Cu-Ni-Fe-8Al-La alloy with proper amount of Al and trace La is expected to be an alternative anode material for inert anode aluminum electrolysis.

关 键 词：稀土La 惰性阳极 铝电解 腐蚀 

分 类 号：TF821[冶金工程—有色金属冶金]