Effect of CaO doping on corrosion resistance of Cu/(NiFe2O4-10NiO) cermet inert anode for aluminum electrolysis
来源期刊：中南大学学报(英文版)2008年第6期
论文作者：赖延清 黄礼峰 田忠良 王家伟 张刚 张勇
文章页码：743 - 743
Key words：aluminum electrolysis; Cu/(NiFe2O4-10NiO) cermet; CaO; inert anode; corrosion resistance
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 ℃ 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.
基金信息：the Major State Basic Research and Development Program of China
Hi-Tech Research and Development Program of China
