ISSN 1070-4272, Russian Journal of Applied Chemistry, 2016, Vol. 89, No. 6, pp. 1027−1030. © Pleiades Publishing, Ltd., 2016.
Original Russian Text © V.N. Tseluikin, A.A. Koreshkova,
2016, published in Zhurnal Prikladnoi Khimii, 2016, Vol. 89, No. 6, pp. 825−828.
Synthesis and Properties of Zinc–Nickel–Carbon Nanotube
V. N. Tseluikin* and A. A. Koreshkova
Engels Institute of Technology, Branch of Gagarin State Technical University,
pl. Svobody 17, Engels, Saratov oblast, 413100 Russia
Received May 5, 2016
Abstract—Composite electrochemical coatings modiﬁ ed with carbon nanotubes were produced on the basis of
the zinc–nickel alloy. The functional properties (friction coefﬁ cient, protective capacity) of the composite coatings
were studied in comparison with zinc–nickel alloys without a dispersed phase. It was found that, upon inclusion
of carbon nanotubes particles into zinc–nickel deposits, their sliding friction coefﬁ cient decreases by a factor of
1.3–1.4 and the range of passive-state potentials becomes two times wider.
One of ways to improve the functional properties of
electrolytic zinc coatings is via deposition of zinc alloys
with other metals. In some cases, zinc alloys are used
to replace toxic cadmium coatings and, in addition,
these alloys can preserve a high corrosion resistance
at elevated temperatures . Nickel can serve as an
effective alloying additive to zinc. Zinc–nickel alloys
have better corrosion and physicomechanical properties
as compared with purely zinc coatings [1, 2]. An even
more pronounced effect can be reached via deposition
of composite electrochemical coatings (CECs) based
on the zinc–nickel alloy. The functional properties of
CECs are largely determined by the nature of the dis-
persed phase [3–5]. A promising material in this regard
are carbon nanotubes (CNTs), which are cylindrical
structures formed as a result of the rolling-up of planar
atomic layers of graphite (graphenes). These may be
single- or multiple-walled (constituted by several co-
axial cylinders) [6, 7].
Previously, zinc–CNT CECs have been obtained and
their functional properties have been studied [8, 9].
The goal of our study was to obtain zinc–nickel–
CNT composite coatings and examine their tribological
properties and protective capacity.
CECs based on the zinc–nickel alloy were deposited
from the electrolyte of composition (g L
): ZnO 10,
O 50, NH
Cl 220, CH
COONa 20, carbon
nanotubes 0.05. The coatings were deposited on a steel
base (steel 45) at room temperature under permanent
agitation of the electrolyte. Deposits of a pure alloy
were obtained from a solution of the above composition
without a dispersed phase.
We used CNTs produced by pyrolysis of hydrocarbons
with a nickel catalyst, having the form of hollow ﬁ bers
formed by graphene layers of fullerene-like design with
diameters of 10 to 60 nm .
Electrochemical measurements were made with a
P-30S pulsed potentiostat. The potentials were set relative
to a saturated silver chloride reference electrode and
recalculated to the hydrogen scale.
Tribological tests were made in friction without a
lubricating material. A steel sample (carbon steel) was
used as a counter body. The mass of the counter body
was 1 g in all the tests.
The sliding friction coefﬁ cients of the coatings under
study were determined by the formula