Anodic Corrosion Behavior of NiFe2O4-Based Cermet in Na3AlF6-K3AlF6-AlF3 for Aluminum Electrolysis

被引：0
|
作者：
Zhongliang Tian
Yanqing Lai
Shu Yang
Jie Li
Jiann-Yang Hwang
Yexiang Liu
机构：
[1] Central South University,School of Metallurgy and Environment
[2] Michigan Technological University,Department of Materials Science and Engineering
来源：
Metallurgical and Materials Transactions B | 2015年 / 46卷
关键词：
NiFe2O4; Metal Phase; Metal Aluminum; CuAl2O4; NiAl2O4;
D O I：
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中图分类号：
学科分类号：
摘要：
A (Cu,Ni)/(10NiO-NiFe2O4) cermet was tested as an inert anode for aluminum electrolysis in Na3AlF6-K3AlF6-AlF3 melt at 1173 K (900 °C), and its corrosion behavior was studied. The results show that the low-temperature Na3AlF6-K3AlF6-AlF3 bath is beneficial, improving the service conditions. With the combined effects of the electrolyte composition and the nascent oxygen during electrolysis, the metal phase (Cu,Ni) at the surface of anode will not be leached preferentially, but be transferred into the aluminates including FeAl2O4, NiAl2O4 and CuAl2O4. This is helpful for the anode to improve its corrosion resistance.
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页码：1257 / 1261
页数：4
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