Electrochemical synthesis of Sn–Ag alloy coatings in sulphate solution

  • Olga N. Vrublevskaya Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus; Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus https://orcid.org/0000-0002-4877-0974
  • Marina A. Shikun Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus https://orcid.org/0000-0003-2655-2332
DOI: https://doi.org/10.33581/2520-257X-2019-2-51-61

Abstract

The optimal conditions for the electrochemical synthesis in the sulfate electrolyte of low-melting Sn–Ag alloy coatings used in the assembly of electronic equipment containing 7.1–8.3 at. % of silver and with total current yield of metals equal to 88.8–87.0 % are determined. It is established that electrochemical reduction of Sn(II) and Ag(I) on the surface of the alloy is accompanied by the process of contact displacement of Ag(I) with tin included into the coating. The process of contact displacement is intensified with the electrolyte temperature growth and leads to the increase in silver content in the alloy, to the appearance of dendrites on the surface of the coating due to its passivation.

Author Biographies

Olga N. Vrublevskaya, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus; Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

PhD (chemistry), docent; scientific secretary, Research Institute for Physical Chemical Problems, Belarusian State University, and associate professor at the department of inorganic chemistry, faculty of chemistry, Belarusian State University

Marina A. Shikun, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

master’s degree student at the department of inorganic chemistry, faculty of chemistry

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Published
2019-08-30
Keywords: electrochemical deposition, alloy, silver, tin, eutectic, sulphate electrolyte, microstructure, electrolyte temperature
Supporting Agencies This work was supported by the Belarusian Republican Foundation for Fundamental Research (grant No. X18M-060).
How to Cite
Vrublevskaya, O. N., & Shikun, M. A. (2019). Electrochemical synthesis of Sn–Ag alloy coatings in sulphate solution. Journal of the Belarusian State University. Chemistry, 2, 51-61. https://doi.org/10.33581/2520-257X-2019-2-51-61
Issue
No 2 (2019): Journal of the Belarusian State University. Chemistry
Section
Original Articles

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