摘要
利用—个两室隔膜电解池将阳极液和阴极液分开,考察了镍锍阳极在酸性氯化物水溶液中与Fe^(3+)/Fe^(2+)偶合反应速度。在两极静态电位差的驱动下,测定短路外电路电流以推算两极偶合反应速度。结果表明,阴极反应速度与溶液中铁离子浓度、温度和旋转阴极盘速度有关,而阳极溶解符合固相扩散和电荷迁移混合控制。当阴极面积足够大时,混合电位在短路放电后几乎不随时间变化,只比阴极静态电位稍低,其电流时间关系可用一个电化学方程描述。阳极溶出的表观活化能为8.208kJ/mol。
By using an electroless configuration with a diaphragm separating anol yte and catholyte, the anodic dissolution rate of nickel matte in acidic chloride solution was investigated.Under direct short circuiting of the cell, the coupled reactions were driven by the open circuit rest potentials of the nickel matte and the rotating graphite disk-iron chloride couple. The mixed currents and potentials were measured at different conditions. The reaction rate at a coupled graphite cathode was found to depend on iro...
出处
《有色金属》
CSCD
1993年第4期50-54,共5页
Nonferrous Metals
关键词
电化学
镍锍
腐蚀溶出
electrochemical corrosion
nickel matte
dissolution
