Peculiarities of the Mechanism of Zinc Electrodeposition
from Zincate Electrolyte Containing Polyethylene Polyamine

V. N. Selivanov, I. G. Bobrikova, S. V. Molchanov, and S. G. Shestak

Novocherkassk State Technical University, Novocherkassk, Russia

Received September 4, 1995

Abstract—By the rotating disk electrode method, using the sandwich electrode that we developed, it is found
that the rate of zinc electrodeposition from zincate electrolytes containing polyethylene polyamine does not
depend on the intensity of electrolyte stirring and the hydrogen evolution rate at potentials more negative than
–1.57 V (in the current-density range of semibright deposit production). The limiting current density of the
[Zn(OH)₄]² ion diffusion through a film of zinc oxides and hydroxides is shown to be responsible for formation
of dark, friable zinc deposits in the potential range from –1.33 to –1.47 V.

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