Electrodeposition of Nickel from Ni(CF3COO)2-HCONH2 Bath
1972 Volume 1972 Issue 9 Pages 1635-1642
Details
1972 Volume 1972 Issue 9 Pages 1635-1642
This paper deals with the electrodeposition of nickel from Ni(CF3COO)2-HCONH2 solutions. The properties of Ni(CF3COO)2-HCONH2 bath and the mechanism of electrodeposition of nickel were studied.
Specific conductance of a Ni(CF3COO)2-HCONH2 solution and apparent molecular volume of Ni(CF3COO)2-HCONH2 became constant when the concentration of Ni(CF3COO)2 was increased beyond about 200g/l.
There was a tendency for Ni(CF3COO)2-HCONH2 solution to increase its viscosity with the increase of the concentration of Ni(CF3COO)2.
Bright and smooth nickel deposits were obtained at a current density in the range of 0.5∼2.0 A/dm2 from Ni(CF3COO)2 80∼100 g/HCONH2 11 bath at 60°C, the current efficiencies for cathode and anode being about 90 % and 100 %, respectively.
The cross-section of the nickel deposits was found to have granular structure. The grain orientation was strong [111], but weak [220] and [200]. The grain size was 70∼80 Å.
The rate of electrodeposition of nickel from Ni(CF3COO)2-HCONH2 bath at a current density ranging from 0.9 to 4.8 A/dm2 was controlled by a charge transfer reaction.
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