CAJ | 학술논문

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180 g/L,即酸锌比为3.6,Mn2+浓度为3～5g/L,Fˉ浓度小于42 mg/L时有利于Pb-Ag阳极钝化；而当溶液中只存在Cl-时,Clˉ浓度必须低于13 mg/L才不会影响电极的钝化过程；当溶液中同时存在Mn2+和Clˉ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Clˉ的含量最高,可以达到625 mg/L.
채용선성소묘복안법연구료회용수중잡질리자대자전해과정중Pb-Ag양겁둔화적영향.결과표명:회용수중Cl-화F-적존재장회영향전겁적둔화과정.당용액중H2SO4농도위180 g/L,즉산자비위3.6,Mn2+농도위3～5g/L,Fˉ농도소우42 mg/L시유리우Pb-Ag양겁둔화；이당용액중지존재Cl-시,Clˉ농도필수저우13 mg/L재불회영향전겁적둔화과정；당용액중동시존재Mn2+화Clˉ차맹록질량비위8시,전겁적둔화과정불회수도Cl-적영향,차시용액중Clˉ적함량최고,가이체도625 mg/L.
Effect of impurities in recycling water on Pb-Ag anode passivation in zinc electrowirning process was investigated by linear scan voltammetry.Results show that passivation process would be affected in the presence of Clˉ and Fˉ in recycling water.It was highly advantageous to take H2SO4 concentration as 180 g/L,Mn2+ concentration as 3-5 g/L and Fˉ less than 42 mg/L.However,passivation process would not be affected when Clˉ concentration was less than 13 mg/L without any other ions,or when mass ratio ofMn2+ to Clˉ existing in electrolyte was 8,where Cl- concentration could reach up to 625 mg/L.