Formation of Al-Ni master alloys using nickel anode

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. A01; pp. 300 - 303
• Main Author: 曹大力 王吉坤 石忠宁 王兆文 马雷 王惠华
• Format: Journal Article
• Language: English
• Published: 01.11.2007
• Subjects: 电子分布
• ISSN: 1003-6326

Nickel anode was investigated as a potential anode of aluminium electrowinning for preparation of Al-Ni master alloys. The electrolysis tests were carried out in Na3AlF6-Al2O3 based melts at 940℃. The results show that the cell voltage during electrolysis has only minor instability, and there exists NiO phase in electrolyte after 0.5 h electrolysis. Ni content in A1-Ni master alloys increases with increasing the electrolysis time. Concentration limit of Ni in Al-Ni master alloys can be up to 33.8% （mass fraction）. However, substantial corrosion of the Ni-metal substrate is observed, and the oxide scale on the nickel anode after electrolysis is porous and loose that does not prevent corrosion of the substrate.