亜鉛電解におけるマンガンの挙動に関する研究

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タイトル別名
  • Studies on the Behavior of Manganese in Electrodeposition of Zinc
  • アエン デンカイ ニ オケル マンガン ノ キョドウ ニ カンスル ケンキュウ

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抄録

As some portion of manganese ion is oxidized at the anode during the electrolysis of zinc, these phenomena have been observed by the spectrophotometry and chemical analysis. The results are as follows. MnO4- is first formed by the anodic oxidation of Mn+2 in the zinc electrolyte solution. This MnO4- immediately reacts with Mn+2 and is converted into fairly stable, Mn+3, and finaly MnO2 is formed. The formation of MnO2 is much greater in case of pure lead or lead-silver anode than in platinum anode.<BR>The effects of Mn+2, Mn+3, MnO4- and floated Mn02 on the current efficiencies and potentials on electrodeposited zinc have been observed. It was found that these effects are not so great, but the presence of MnO4- or Mn+3 decreases the current efficiencies to some extent, and indicates the negative potential, as compared with Mn+2.<BR>The effects of MnO2 formed on the surface of the anode during the zinc electrolysis have been determined, using the pure lead and lead-silver alloy anodes coated with a layer of MnO2, prepared by the electrolytic oxidation in MnSO4 solution at their optimum conditions. The MnO2 film formed on the anode surfacebecome more coherent, when the electrolytic oxidation is done at higher temperature, and in case of leadsilver alloy anode than in case of pure lead anode. The MnO2 film on the anode seems to have little effect decrease the lead content in electrodeposited zinc.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 76 (863), 311-318, 1960

    一般社団法人 資源・素材学会

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