銅陽極電位に及ぼす不純物の影響 (第3報)
鉄, ニッケル, 亜鉛及びアルミニウムの影響
1963 年 79 巻 895 号 p. 25-29
詳細
1963 年 79 巻 895 号 p. 25-29
Effect of iron, nickel, zinc and aluminium on anode potential has been studied. Iron exists of copper grain boundaries asα-Fe, so it reacts with Cu++ ions to produce considerable amount of copper slime on anode surface. Consequently, anode potential of iron bearing copper anode is raised. Within the amount as impurities nickel, zinc and aluminium are dissolved in copper asα-solid solution. By the alloying of these elements standard electrode potentials of these alloys are raised, but these effects are very little. During electrolysis of nickel bearing copper anode nickel salt is produced in anode film solution. The presence of nickel salt increase electric resistance, so the anode potential is raised. Zinc atoms in copper anode react with Cu++ ions to produce copper slime on the anode surface. The presence of copper slime yields raise of anode potential. The effect of aluminium is little.
