| Effect of CaO doping on corrosion resistance of Cu/（NiFe2O4-10NiO） cermet inert anode for aluminum electrolysis |
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| 引用本文： | 赖延清,黄礼峰,田忠良,王家伟,张刚,张勇.Effect of CaO doping on corrosion resistance of Cu/（NiFe2O4-10NiO） cermet inert anode for aluminum electrolysis[J].中南工业大学学报(英文版),2008,15(6):743-747. |
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| 作者姓名： | 赖延清 黄礼峰 田忠良 王家伟 张刚 张勇 |
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| 作者单位： | School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | Project（2005CB623703） supported by the Major State Basic Research and Development Program of China; Project（2008AA030503） supported by Hi-Tech Research and Development Program of China |
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| 摘 要： | The CaO-doped Cu/（NiFe2O4-10NiO） cermet inert anodes were prepared by the cold isostatie pressing-sintering process, and their corrosion resistance to Na3AlF6-K3AlF6-Al203 melt was studied. The results show that the relative density of 5Cu/（NiFe2O4-10NiO） cermet sintered at 1 200 ℃ increases from 82.83% to 97.63% when 2% CaO （mass fraction） is added. During the electrolysis, the relative density of cermet inert anode descends owing to the chemical dissolution of additive CaO at ceramic grain boundary, which accelerates the penetration of electrolyte. Thus, the corrosion resistance to melts of Cu/（NiFe2O4-10NiO） cermet inert anode is reduced. To improve the corrosion resistance of the cermet inert anode, the content of CaO doped should be decreased and the technology of cleaning the ceramic grain boundary should be applied.
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| 关 键 词： | 铝电解 金属陶瓷 氧化钙 惰性阳极 耐蚀力 |
Effect of CaO doping on corrosion resistance of Cu/(NiFe2O4-10NiO) cermet inert anode for aluminum electrolysis |
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| Yan-qing Lai, Li-feng Huang, Zhong-liang Tian, Jia-wei Wang, Gang Zhang and Yong Zhang.Effect of CaO doping on corrosion resistance of Cu/(NiFe2O4-10NiO) cermet inert anode for aluminum electrolysis[J].Journal of Central South University of Technology,2008,15(6):743-747. |
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| Authors: | Yan-qing Lai Li-feng Huang Zhong-liang Tian Jia-wei Wang Gang Zhang and Yong Zhang |
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| Affiliation: | (1) School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China |
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| Abstract: | The CaO-doped Cu/(NiFe2O4-10NiO) cermet inert anodes were prepared by the cold isostatic pressing-sintering process, and their corrosion resistance
to Na3AlF6-K3AlF6-Al2O3 melt was studied. The results show that the relative density of 5Cu/(NiFe2O4-10NiO) cermet sintered at 1 200 °C increases from 82.83% to 97.63% when 2% CaO (mass fraction) is added. During the electrolysis,
the relative density of cermet inert anode descends owing to the chemical dissolution of additive CaO at ceramic grain boundary,
which accelerates the penetration of electrolyte. Thus, the corrosion resistance to melts of Cu/(NiFe2O4-10NiO) cermet inert anode is reduced. To improve the corrosion resistance of the cermet inert anode, the content of CaO doped
should be decreased and the technology of cleaning the ceramic grain boundary should be applied.
Foundation item: Project(2005CB623703) supported by the Major State Basic Research and Development Program of China; Project(2008AA030503)
supported by Hi-Tech Research and Development Program of China |
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| Keywords: | aluminum electrolysis Cu/(NiFe2O4-10NiO) cermet CaO inert anode corrosion resistance |
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