2 0 0 0 OA ファラデーの電気分解の法則 —原論文を読み解く—(前編)
- 著者
- 金児 紘征
- 出版者
- 公益社団法人 電気化学会
- 雑誌
- Electrochemistry (ISSN:13443542)
- 巻号頁・発行日
- vol.83, no.11, pp.1032-1040, 2015-11-05 (Released:2015-11-05)
- 参考文献数
- 33
- 被引用文献数
- 2
1 0 0 0 OA 酸性硫酸銅水溶液中における銅と銀および亜鉛のガルバニック対の電気化学的挙動とその場観察
- 著者
- 高崎 康志 川上 祥一 久保 雛乃 金児 紘征
- 出版者
- 一般社団法人 資源・素材学会
- 雑誌
- Journal of MMIJ (ISSN:18816118)
- 巻号頁・発行日
- vol.139, no.9, pp.39-46, 2023-09-30 (Released:2023-09-30)
- 参考文献数
- 17
The anodic dissolution reaction of copper in copper electro-refining was studied by considering the reaction of galvanic couples with different metals as impurities. In this study, zinc was chosen as a typical anodic impurity and silver as a cathodic impurity, and electrochemical measurements of galvanic couples with silver or zinc wires winding around a copper wire and in situ observation of the electrode surface using a stereo microscope were carried out. For comparison, copper wire with zinc or silver plating was used. As a result, even the simple method of winding silver or zinc wire around copper wire was able to capture the characteristic behavior of the galvanic reaction of silver and zinc on copper wire. It was also confirmed that zinc dissolution was accelerated by copper and copper dissolution was accelerated by silver, and that the effects were more promoted under anodic polarization. The crystallization and passivation of copper sulfate on the copper electrode surface and the dissolution behavior of silver were also observed. These results indicate that the experimental method presented in this study is an effective way to investigate the effects of impurities on the solubility and passivation of crude copper metal.