中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 8 No. 1 March 1998 |
ELECTRODEPOSITION OF Ti-Ni ALLOY IN UREA-NaBr-KBr MELT
Yang Qiqin, Liu Guankun, Ke Shan and Tong Yexiang
（Department of Chemistry, Zhongshan University, Guangzhou 510275, P. R. China）
Abstract:The cyclic voltammetry and potential-time curve at current step were used to investigate the electroreduction of Ni(Ⅱ), Ti(Ⅳ) in the urea-NaBr-KBr melt. The electroreduction of Ni(Ⅱ) to nickel is irreversible in one step. The transfer coefficient and the exchange current density of the reaction Ni(Ⅱ)+2e =Ni were determined as 0.4 and 1.1×10-6A·cm-2 at 100℃. The Ti(Ⅳ) was reduced to Ti(Ⅲ) and formed alloy with Ni on cathode in urea-NaBr-KBr-NiCl2-TiCl4 melt. The content of Ti in the Ti-Ni alloy changed with the cathode potential and reached 59% (in mole).
Key words: urea-NaBr-KBr melt electroreduction of Ni(Ⅱ) electrodeposition of Ti-Ni alloy
