| Preliminary testing of NiFe2O4-NiO-Ni cermet as inert anode in Na3AlF6-AlF3 melts |
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| 作者姓名： | 赖延清 田忠良 李劼 叶绍龙 刘业翔 |
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| 作者单位： | School of Metallurgical Science and Engineering C entral South University Changsha 410083 China，School of Metallurgical Science and Engineering C entral South University Changsha 410083 China，School of Metallurgical Science and Engineering C entral South University Changsha 410083 China，School of Metallurgical Science and Engineering C entral South University Changsha 410083 China，School of Metallurgical Science and Engineering C entral South University Changsha 410083 China |
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| 基金项目： | 国家研究发展基金;国家高技术研究发展计划(863计划);湖南省自然科学基金 |
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| 摘 要： | 1 Introduction It is well known that the current aluminum reduction cell with carbon consumable anode has many disadvantages. So the concept of inert anode was introduced, with which the disadvantages can be avoided completely. A lot of research work has…
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| 关 键 词： | 初步试验 NiFe2O4 陶瓷 电导率 耐蚀性 惰性阳极 Na3AlF6-AlF3 |
| 收稿时间： | 2005-12-07 |
| 修稿时间： | 2006-03-06 |
Preliminary testing of NiFe2O4-NiO-Ni cermet as inert anode in Na3AlF6-AlF3 melts |
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| LAI Yan-qing,TIAN Zhong-liang,LI Jie,YE Shao-long,LIU Ye-xiang.Preliminary testing of NiFe2O4-NiO-Ni cermet as inert anode in Na3AlF6-AlF3 melts[J].Transactions of Nonferrous Metals Society of China,2006,16(3):654-658. |
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| Authors: | LAI Yan-qing TIAN Zhong-liang LI Jie YE Shao-long LIU Ye-xiang |
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| Affiliation: | 1. Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Str. 2, D-12489 Berlin, Germany;2. Leibniz Universität Hannover, Institute of Physical Chemistry and Electrochemistry, and ZFM – Center for Solid State Chemistry and New Materials, Callinstr. 3a, D-30167 Hannover, Germany;1. Graduate School of Science and Engineering, Saitama University, 255, Shimo Okubo, Sakura ku, Saitama shi, Saitama 338-8570, Japan;2. Department of Civil and Environmental Engineering, Saitama University, 255, Shimo Okubo, Sakura ku, Saitama shi, Saitama 338-8570, Japan |
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| Abstract: | The electrical conductivity of cermet 83(90NiFe2O4-10NiO)-17Ni at different temperatures was measured in air, the operating performance of inert anode was evaluated in a laboratory electrolysis cell with various electrolyte compositions. The results indicate that the electrical resistivity of cermet studied has negative temperature coefficient, which is the characteristic of semi-conducting material. The proper addition of AlF3 in the bath can improve the corrosion resistance of cermet inert anode, but excess adding amount will cause the catastrophic corrosion. Post-examination of anodes shows that metal Ni leaches preferentially on the anode surface. Chemical dissolution, electrolyte penetration as well as electrochemical dissolution serve as major corrosion mechanisms. |
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| Keywords: | aluminium electrolysis inert anode NiFe2O4 based cermet electrical conductivity corrosion resistance |
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