ELECTRODEPOSITION OF Ti-Ni ALLOY IN UREA-NaBr-KBr MELT

ＥＬＥＣＴＲＯＤＥＰＯＳＩＴＩＯＮＯＦＴｉＮｉＡＬＬＯＹＩＮＵＲＥＡＮａＢｒＫＢｒＭＥＬＴ①ＹａｎｇＱｉｑｉｎ，ＬｉｕＧｕａｎｋｕｎ，ＫｅＳｈａｎａｎｄＴｏｎｇＹｅｘｉａｎｇＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｏｎｇｓｈａｎＵｎｉｖ...

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^-6A·cm^-2 at 100 ℃. The Ti(Ⅳ) was reduced to Ti(Ⅲ) and formed alloy with Ni on cathode in ureaNaBrKBrNiCl_2TiCl_4 melt. The content of Ti in the TiNi alloy changed with the cathode potential and reached 59% (in mole).