Study of anode processes during development of the new complex thiocarbamide­citrate copper plating electrolyte

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.123852

Keywords:

complex compounds, anodic polarization, limiting stage, diffusion overvoltage, polarization dependence

Abstract

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(NH2)2 and C6H8O7 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.

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–ja/jd). An increase in υр within 5‒100 mV·s–1 causes an increase in jd from 2.2 to 12.0 mА·cm–2, 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.

Author Biographies

Olha Smirnova, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of technical electrochemistry

Alexei Pilipenko, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Senior Lecturer

Department of technical electrochemistry

Hanna Pancheva, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Senior Lecturer

Department of labor and environment protection

Kateryna Rutkovska, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Postgraduate student

Department of technical electrochemistry

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Published

2018-02-19

How to Cite

Smirnova, O., Pilipenko, A., Pancheva, H., Zhelavskyi, A., & Rutkovska, K. (2018). Study of anode processes during development of the new complex thiocarbamide­citrate copper plating electrolyte. Eastern-European Journal of Enterprise Technologies, 1(6 (91), 47–52. https://doi.org/10.15587/1729-4061.2018.123852

Issue

Vol. 1 No. 6 (91) (2018): Technology organic and inorganic substances

Section

Technology organic and inorganic substances

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Copyright (c) 2018 Olha Smirnova, Alexei Pilipenko, Hanna Pancheva, Alexei Zhelavskyi, Kateryna Rutkovska

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