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从槽液Mn2+浓度、电解时间和过电位关键因素研究电解初期过程,在三电极体系采用计时电量法探讨和优化工艺参数.研究表明,在不锈钢表面,锰的初期电解析氢显著.随时间延长,锰逐渐覆盖于不锈钢表面,析氢更困难,其电流效率随之提升,在高过电位区出现极限电流,反应受扩散控制.在含0.02 g·L-1SeO2溶液体系中,在40 g·L-1Mn2++120 g·L-1(NH4)2SO4、过电位为0.151 V、槽液温度为40oC、PH为6.6、时间为0.5 h的电解条件下,电流效率可达95.3%;在实用矿粉制液体系,效率也可达81.4%,较企业相同电解体系提高了15%.
The initial electrolysis process was studied from the key factors of bath Mn2 + concentration, electrolysis time and overpotential, and the process parameters were discussed and optimized by chronopotentiometric method in the three-electrode system.The results showed that the primary electrolysis hydrogen evolution of manganese was remarkable on the surface of stainless steel, , Manganese gradually covered the surface of stainless steel, hydrogen evolution is more difficult, and its current efficiency increases, the limit current appears in the over-potential region, the reaction is controlled by diffusion.In 0.02 g · L-1SeO2 solution system, at 40 g · L -1Mn2 + + 120 g · L-1 (NH4) 2SO4, overpotential of 0.151 V, bath temperature of 40oC, PH of 6.6 and electrolysis time of 0.5 h, the current efficiency can reach 95.3% Powder liquid system, the efficiency of up to 81.4%, compared with the same enterprise Electrolysis system increased by 15%.