In this work, nickel-cobalt electrodeposition under galvanostatic conditions was investigated. Ni-Co alloy was electrowon from an acid sulphate bath containing 40 g/L Ni and 2-8 g/L Co.. The effect of electrolyte composition, current density, temperature, solution pH and presence of buffers such as H{sub}3BO{sub}3 and (NH{sub}4)2SO{sub}4 on Co content of the binary alloy has been investigated. In particular, current densities ranging from 180 to 400 A/m{sup}2 and temperatures ranging from 27 to 60°C were tested. The composition of Ni-Co alloys may be diversified through the selection of process parameters. The experiments show that the highest cobalt content of the alloy is reached by using a buffer free electrolyte without solution pH control. Though, in these conditions, the most homogeneous, fine and regular deposit morphology is obtained, energy requirements are the highest in tests lasting just two hours.
展开▼
机译：在这项工作中，研究了镍钴电沉积在镀锌条件下。 Ni-Co合金是从含有40g / L Ni和2-8g / L Co的酸性硫酸盐浴的电向电瓦。电解质组合物，电流密度，温度，溶液pH和缓冲液如H {Sub}的效果。已经研究了二元合金的CO含量的3bo {sub} 3和（nh {sub} 4）2so {sub} 4。特别地，测试的电流密度范围为180-400A / m {sup} 2和温度范围为27至60℃。通过选择工艺参数，Ni-Co合金的组合物可以多样化。实验表明，通过使用没有溶液pH对照的缓冲游离电解质来达到合金的最高钴含量。虽然，在这些条件下，获得最均匀的，精细和常规的沉积形态，能量要求是持续两小时的测试中最高的。
展开▼
