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Effect of electrolyte composition on the conditions of formation of a finely divided tin-bismuth alloy

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

  1. 1.

    It is shown that raising the electrolyte concentration increases the rate of tin and bismuth ion discharge, and at the same time improves the alloy current efficiency.

  2. 2.

    It has been established that raising the concentration of hydrochloric acid in the electrolyte brings about a decrease in alloy current efficiency, which is a result of an increase in the amount of hydrogen being liberated.

  3. 3.

    With rising concentration of the complex-forming agent the alloy and bismuth current efficiencies grow as a consequence of Increase in the rate of [BiCl4]−ion discharge.

  4. 4.

    The optimum electrolyte composition and process parameters, ensuring the formation of an alloy with 38% tin and 47% bismuth, are:CSnCl2 50 g/liter,CBiCl3 50 g/liter,CNH4Cl 100 g/liter,CHCl 20 g/liter, łc=15 A/dm2, T=20°C, and 0.5% solution of oleic acid in toluene as the upper layer.

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Literature cited

  1. É. M. Natanson, Colloid Metals [in Russian], Izd. Akad. Nauk Ukr. SSR, Kiev (1959).

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  2. Yu. I. Khimchenko, E. P. Zhelibo, and V. G. Kushnir, “Electrolyte for the manufacture of bismuth-tin alloy powder,” Inventors' Certificate No. 526685, Aug. 10, 1976.

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  4. V. I. Kravtsov, Electrode Processes in Metallic Complex Solutions [in Russian], Leningrad Univ., Leningrad (1969).

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  5. L. M. Volosnikova, M. M. Nabiev, and Kh. R. Imatov, “Effect of ammonium chloride on the solubility of bismuth chloride,” in: Chemistry and Chemical Technology of Rare and Nonferrous Metals [in Russian], Fan, Tashkent (1974), pp. 111–114.

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Authors and Affiliations

  1. Institute of Colloid Chemistry and the Chemistry of Water, Academy of Sciences of the Ukrainian SSR, Ukraine

    E. P. Zhelibo & V. G. Grechanyuk

Authors
  1. E. P. Zhelibo
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  2. V. G. Grechanyuk
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Translated from Poroshkovaya Metallurgiya, No. 8(188), pp. 5–9, August, 1978.

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Zhelibo, E.P., Grechanyuk, V.G. Effect of electrolyte composition on the conditions of formation of a finely divided tin-bismuth alloy. Powder Metall Met Ceram 17, 575–579 (1978). https://doi.org/10.1007/BF00797327

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  • DOI: https://doi.org/10.1007/BF00797327

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