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采用线性扫描伏安法研究了回用水中杂质离子对锌电解过程中Pb-Ag阳极钝化的影响。结果表明:回用水中Cl-和F-的存在将会影响电极的钝化过程。当溶液中H2SO4浓度为180g/L,即酸锌比为3.6,Mn2+浓度为3～5g/L,F-浓度小于42mg/L时有利于Pb-Ag阳极钝化;而当溶液中只存在Cl-时,Cl-浓度必须低于13mg/L才不会影响电极的钝化过程;当溶液中同时存在Mn2+和Cl-且锰氯质量比为8时,电极的钝化过程不会受到Cl-的影响,此时溶液中Cl-的含量最高,可以达到625mg/L。
Linear sweep voltammetry was used to investigate the influence of impurity ions in reuse water on Pb-Ag anode passivation during zinc electrolysis. The results show that the presence of Cl- and F- in the reuse water will affect the electrode passivation process. When the concentration of H2SO4 in the solution is 180g / L, the ratio of zinc to zinc is 3.6, the concentration of Mn2 + is 3 ~ 5g / L and the concentration of F- is less than 42mg / L, Pb-Ag anode passivation is favorable. -, the concentration of Cl- must be less than 13mg / L, which will not affect the passivation of the electrode. When Mn2 + and Cl- are both present in the solution and the mass ratio of manganese to chlorine is 8, the passivation of the electrode is not affected by Cl- Of the impact, this time the highest content of Cl-in solution, up to 625mg / L.