在高温熔盐电解质78.07%Na3AlF6-9.5%AlF3-5.0%CaF2-7.43%Al2O3中对NiFe2O4-10NiO基陶瓷进行了电解腐蚀性能研究,结果发现烧结后的陶瓷NiFe2O4相中的Fe/Ni比为2.211～2.89,且NiO相的Fe/Ni比为0.136～0.34,而电解腐蚀后NiFe2O4相中的Fe/Ni比为2.07～2.335,且NiO相中Fe/Ni比为0.120～0.195,说明在电解腐蚀过程中Fe元素发生了优先腐蚀。铁元素在电解过程中发生优先腐蚀的原因可能是化学腐蚀和电化学腐蚀共同作用的结果。
The electrolysis corrosion performance of NiFe2 O4-10NiO based ceramic was investigated in high tem- perature melt of 78.07%Na3AlF6G-9.5%AlF3-5.0%CaF2-7.43%A12O3. The results showed that Fe/Ni atomic ratio in NiFe2 O4 and NiO phase after sintered is 2. 211-2.89 and 0. 136-0.34, respectively, but Fe/Ni atomic ratio in NiFe2 04 and NiO phase after electrolysis is 2.07-2. 335 and 0. 120-0.195, respectively. So the Fe/Ni atomic ra- tio in NiFe2 04 and NiO phase decreased in some extent and preferential corrosion of Fe element happened in the process of aluminum electrolysis. Possibly the synergism of chemical corrosion and electrochemical corrosion re- sult in the preferential corrosion dissolution of Fe element.
参考文献
| [1] | 何汉兵,肖汉宁,周科朝.添加剂BaO对铝电解用xCu/（10NiO-NiFe2O4）金属陶瓷惰性阳极腐蚀性能的影响[J].中国有色金属学报（英文版）,2011(01):102-108. |
| [2] | Olsen E;Thonstad J .[J].Journal of Applied Electrochem-istry,1999,29(03):293-299. |
| [3] | Lai Y Q;Tian Z J;Li J et al.[J].Transactions of Nonfer-rous Metals Society of China,2006,16:970-974. |
| [4] | He H B;Zhou K C;Li Z Y et al.[J].Transactions of Nonferrous Metals Society of China,2008,18(05):1134-1138. |
| [5] | Li J;Zhang G;Lai Y Q et al.[J].Journal of Central South University of Technology(English Edition),2007,14(05):629-632. |
| [6] | 张雷,周科朝,李志友,张晓泳.气氛对NiFe2O4陶瓷烧结致密化的影响[J].中国有色金属学报,2004(06):1002-1006. |
| [7] | He H B;Li Z Y;Zhou K C et al.[J].Journal of Central South University of Technology(English Edition),2009,16(05):703-707. |
| [8] | Xi J H;Xie Y J;Yao G C et al.[J].Transactions of Nonferrous Metals Society of China,2008,18:356-360. |
| [9] | Alcoa .Corrosion of Cermet Anodes During Low Temper-ature Electrolysis of Alumina[R].New York.Alcoa Tech-nical Center,1997. |
| [10] | Abakumov A M .[J].X Aluminium Siberia,2004,7(10):12. |
| [11] | Yan X Y;Pownceby M I;Brooks G.The Transfer of Nickel,Iron and Copper from Hall Cell Melts to Molten Aluminum[M].Warrendale,PA:TMS,2007:909-913. |
| [12] | Luo T;Wang Z;Yu X.Solubilities of Oxides for Inert Anodes in Cryolite-Based Melts[M].Warrendale,PA.TMS,2007:941-943. |
| [13] | DeYoung D H.Solubilities of Oxides for Inert Anode in Cryolite-Based Melts[M].Warrendale,PA.TMS,1986:299-307. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%