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

被引：16
|
作者：
Tian, Zhongliang [1 ]
Lai, Yanqing [1 ]
Yang, Shu [1 ]
Li, Jie [1 ]
Hwang, Jiann-Yang [2 ]
Liu, Yexiang [1 ]
机构：
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
[2] Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2015年 / 46卷 / 03期
关键词：
INERT ANODES; NICKEL FERRITE; LOWER TEMPERATURE; SYSTEM; PERFORMANCE; SOLUBILITY;
D O I：
10.1007/s11663-015-0328-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 A degrees 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.
引用
收藏
页码：1257 / 1261
页数：5
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