Study of anode processes during development of the new complex thiocarbamidecitrate copper plating electrolyte
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 1, Issue 6
Abstract
<p>The kinetics of anodic reactions occurring on copper in thiocarbamide-citrate solutions was studied. Thiocarbamide forms stable copper (I) complexes of the cationic type with a coordination number equal to unity. Citric acid ensures acid pH value of electrolyte and causes active dissolution of copper under conditions of anode polarization. The joint presence of CS(NH<sub>2</sub>)<sub>2</sub> and C<sub>6</sub>H<sub>8</sub>O<sub>7</sub> in the solution contributes to the copper electrode activation under conditions of anodic polarization. Increasing the concentration of thiocarbamide leads to a drastic shift of copper dissolution potentials towards the region of negative values. Study of the kinetics of anodic behavior of copper by acquiring the voltammograms revealed the nature of the limiting stage of reaction.</p><p>It is shown that the process of dissolution in a thiocarbamide-citrate electrolyte is controlled by the diffusion phase. This is confirmed by the results of graphical processing of polarization dependences in coordinates η–lg(1–j<sub>a</sub>/j<sub>d</sub>). An increase in υ<sub>р</sub> within 5‒100 mV·s<sup>–1</sup> causes an increase in j<sub>d</sub> from 2.2 to 12.0 mА·cm<sup>–2</sup>, which indicates diffusion control over the process. The process of copper dissolution proceeds under stationary mode with uniform etching of intragrain boundaries and volume of the metal's grain.</p>
Authors and Affiliations
Olha Smirnova, Alexei Pilipenko, Hanna Pancheva, Kateryna Rutkovska
Keywords
Related Articles
- EP ID EP527773
- DOI 10.15587/1729-4061.2018.123852
- Views 75
- Downloads 0
Application of intelligent processing of data flows under conditions of river navigation
<p>Implementation of a context-oriented approach for intelligent processing of navigation data flows in operation of water vehicles was considered. The initial sample of processing data flows in the conditions of the cur...
A study of initial stages for formation of carbon condensates on copper
<p>In the CVD method, samples of carbon condensates were obtained under special conditions (low substrate temperature and short growth times). The use of special technological conditions makes it possible to study the in...
Design of a set of nonlinear control systems of the arc PVD ionplasma installation
<p class="a">Control systems over the set of technological processes of the installation for ion-plasma application of coatings on metal cutting tools are developed. The purpose of the development is the need to improve...
Research of the impact of the method of heating of heat units on the qualitative characteristics of treated materials
<p>An analytical method for calculating the chemical potentials of the components of the gas-solid system based on thermodynamic calculations of carbon potentials of the С–О–Н–N gas mixture (combustion products of the me...
Studying the influence of design and operation mode parameters on efficiency of the systems of biochemical purification of emissions
<p>A procedure for evaluating efficiency of the systems of biological elimination of soluble and insoluble in water harmful gaseous substances as well as dissolved in water contaminants has been devised. The procedure is...