Effect of additive on corrosion resistance of NiFe 2O 4 ceramics as inert anodes
In order to improve the corrosion resistance of NiFe 2O 4 ceramics as inert anode, additive V 2O 5 was added to raw materials NiO and Fe 2O 3. The inert anodes of nickel-ferrite ceramics were prepared by powder metallurgic method and the static corrosion rate in Na 3AlF 6-Al 2O 3 was determined by m...
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Published in | Transactions of Nonferrous Metals Society of China Vol. 18; no. 2; pp. 356 - 360 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2008
|
Subjects | |
Online Access | Get full text |
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Summary: | In order to improve the corrosion resistance of NiFe
2O
4 ceramics as inert anode, additive V
2O
5 was added to raw materials NiO and Fe
2O
3. The inert anodes of nickel-ferrite ceramics were prepared by powder metallurgic method and the static corrosion rate in Na
3AlF
6-Al
2O
3 was determined by mass loss measurement. The effect of V
2O
5 on sintering property and corrosion resistance was studied. The results show that V
2O
5 can promote the grain to develop completely and improve sintering property. EDS results show the reaction product Ni
2FeVO
6 distributes along the grain boundary. The corrosion tests show that V
2O
5 is beneficial to improving corrosion resistance remarkably. The reasons that V
2O
5 can improve the corrosion resistance must be V
2O
5 promoting the gains to develop completely and Ni
2FeVO
6 distributes along the grain boundary. The stable structure can control the chemical dissolution of ceramics anode and the reinforced grain boundary can control the grain-boundary corrosion rate. |
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ISSN: | 1003-6326 |
DOI: | 10.1016/S1003-6326(08)60062-X |