论文部分内容阅读
镀镍溶液中硫酸钠对电介液的导电性、均镀能力和镀层的韧性、延展性、抛光性都有一定影响。因此、准确分析、控制其含量,对于掌握镀镍溶液的性质、提高镀层的质量具有一定意义。本文提出以茜素红S为指示剂,控制pH=2.5～3.0。用氯化钡标准溶液滴定镀镍溶液中硫酸根,溶液由黄色突变为明显红色为终点。本方法具有快速和较为准确的优点。一试剂 0.2N氯化钡标准溶液:称取24.43克BaCl_2·2H_2O(分析纯)溶于1000毫升水中,过滤后,滴入10%HCl5滴,使溶液pH=3～4。用分析纯无水硫
Nickel plating solution of sodium sulfate on the conductivity of the electrolyte, coating capacity and coating toughness, ductility, polishing has a certain impact. Therefore, accurate analysis and control of the content of nickel plating solution for the grasp of the nature of the quality of the coating has a certain significance. In this paper, alizarin red S as an indicator to control the pH = 2.5 ~ 3.0. Titration with barium chloride standard solution of nickel sulfate solution, the solution from yellow to red marked as the end point. The method has the advantages of quickness and accuracy. A reagent 0.2N barium chloride standard solution: Weigh 24.43 g BaCl_2 · 2H_2O (analytical grade) was dissolved in 1000 ml of water, filtered, dripped 10% HCl 5 drops, the solution pH = 3 ~ 4. Analytical pure anhydrous sulfur