Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 2, pp. 247−252.
Pleiades Publishing, Ltd., 2010.
Original Russian Text
N.G. Dem’yantseva, S.M. Kuz’min, M.A. Solunin, A.M. Solunin, S.A. Lilin, 2010, published in Zhurnal Prikladnoi Khimii, 2010,
Vol. 83, No. 2, pp. 249−254.
AND CORROSION PROTECTION OF METALS
Effect of Pulsed Polarization Parameters on the Nickel Shaping
N. G. Dem’yantseva, S. M. Kuz’min, M. A. Solunin, A. M. Solunin, and S. A. Lilin
Ivanovo State University of Power Engineering, Ivanovo, Russia
Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia
Ivanovo State University of Chemical Engineering, Ivanovo, Russia
Received March 19, 2009
Abstract—Electrochemical shaping of nickel under pulsed polarization with various pulse shapes and repetition
frequencies was studied. The effect of parameters of the pulsed dimensional electrochemical machining on the
process of anodic dissolution of the metal was examined.
It is advisable to use the dimensional electrochemical
machining (DECM) based on high-rate local anodic
dissolution of metals to solve a number of practically
important problems: fabrication of articles from hard-
to-machine metals and alloys whose cutting is rather
labor consuming and, occasionally, hardly possible;
fabrication of irregularly shaped articles (including
various molds and turbine and compressor blades);
and processing of articles intolerant against noticeable
When performing DECM processes, it is necessary to
provide a high-speed shaping process (up to millimeters
per minute), with the required precision in both shape
and size (as good as tenths of a micrometer) and low
roughness of the resulting surface (R
= 0.05–0.25 μm).
The above characteristics depend on numerous factors,
among which the most important are the nature and
concentration of solution components, interelectrode
gap between the instrument-electrode (IE) and a working
electrode (WE) being processed, ﬂ ow rate of the working
solution through the interelectrode gap, and anodic
current density. Together with the factors mentioned
above, rather important is the shape of the applied
polarizing signal (dc, sinusoidal, pulsed voltage).
The DECM process under a dc polarizing voltage has
been studied in ample detail and commonly accepted
theoretical models have been developed for this case
[1–4]. At the same time, electrode processes occurring
under pulsed polarization have been insufﬁ ciently
analyzed. Most of studies of DECM in pulsed modes
have been carried out at frequencies of up to 50 kHz
and, as a rule, with rectangular pulses. The main body
of evidence concerning pulsed anodic DECM was
summarized in [1, 4–7]. The topicality of the problem
under consideration is evidenced by results of an
experimental study of microDECM with ±5-V pulses
with repetition frequencies of up to 100 MHz and widths
of 20–500 ns .
The goal of the present study was to examine
processes of nickel shaping with pulses of various
shapes and frequencies applied to the electrochemical
cell, including a superposition of a sinusoidal alternating
current and a dc current.
For carrying out the study, an original electrochemical
cell was fabricated and a setup described in detail in
 (Fig. 1) was assembled. The setup had the form of
a cell 1, made of methyl methacrylate and equipped with
a support in which WE 2, a 0.1-mm-thick nickel foil,
was ﬁ xed. As a cathode served a mobile IE 3, a stainless