低氰三乙醇胺镀铜锌合金工艺

Low-eyanide Triethanolamine Bath for Cu-Zn Alloy Plating

本文首先论述了在当前镍价昂贵,化工原料又普遍上涨的情况下,采用低氰三乙醇胺镀铜锌合金工艺的现实意义。然后又谈了该工艺的特点和它的适用范围,以及套铬后的盐雾试验结果。最后介绍了具体的工艺配方及技术要求:氰化亚铜20-30g/l,氰化锌10-15g/l,氰化钠5--10g/l,氢氧化钠5-10g/l,三乙醇胺20-25g/l,酒石酸钾钠30-50g/l,温度30-40℃,电流密度D_kl--2A/dm^2,pH12-13。并对组成该配方的各种成分的作用进行了详细叙述。此外操作条件如温度、电流密度和pH值的影响以及对阳极的要求等也作了详细的说明。

The application of low-cyanide triethanolamine bath for Cu-Zn alloy plating has become more acceptable due to the high price of nickel and a rise in the price of other chemicals. The characteristics and application fields of this bath and the salt-spray test result after chrome plating are described. In addition, the available composition and operating conditions are given as follows: cuprous cyanide 20-30g/l, zinc cyanide 10-15g/l; sodium cyanide 5-10g/l: sodium hydroxide 5-10g/l; triethanolamine 20-25g/l: potassium sodium tartrate 80-50g/l. T=30-40℃ D_K=1-2A/dm^2; pH=12-13. Finally, the functions of the components of which the composition is made up were discussed in detail and the effect of the operating conditions such as temperature, current density and pH as well as the requirements for anode are also pointed out.