碱性锌镍合金电镀工艺控制要点

摘要

简述了碱性Zn-Ni合金电镀的工艺流程及镀液控制的要点.指出其前处理应做到“四无”——无油、无锈、无挂灰、无氧化膜,而镀液中NaOH/ZnO质量比和Zn2+/Ni2+质量比是影响镀层中含镍量的关键因素.介绍了用赫尔槽试验调整镀液的操作步骤及现场维护要点.%The process flow of alkaline Zn-Ni alloy electroplating and the key points for bath control were described. It is pointed out that the pretreatment effectiveness should be "four noes"—no grease, no rust, no dust, and no oxide film. The mass ratios of NaOH to ZnO and Zn2+ to Ni2+ in bath are key factors affecting the nickel content in coating. The operation procedure of Hull cell test for bath adjustment and the key points for on-site maintenance were introduced.