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镀液成分:氢氧化钠、氧化锌、DE 添加剂、香夹兰素。一试剂酚酞指示剂:1%,1克酚酞溶于80毫升乙醇中,以水稀至100毫升。氯化钡溶液:10%(消除碳酸盐影响用,必要时加10ml)。二分析方法吸取镀液1毫升,加水50毫升,加酚酞二滴,以0.1N 盐酸标准溶液滴定至红色消失即为终点。关于镀液中氢氧化钠分析方法的探讨采用 DE 添加剂无氰碱性锌酸盐镀锌,是在全国推广的一项新工艺,具有成本低、镀件质量好、无毒等优点。碱性镀锌溶液中氢氧化钠的分析,一般资料介绍用亚铁氰化钾消除氧化锌的干扰,氯化钡消除碳
Bath components: sodium hydroxide, zinc oxide, DE additives, incense folder blue prime. A reagent phenolphthalein indicator: 1%, 1 g phenolphthalein dissolved in 80 ml of ethanol, diluted with water to 100 ml. Barium chloride solution: 10% (to eliminate the impact of carbonate, if necessary, add 10ml). Two analytical methods Draw bath 1 ml, add water 50 ml, add phenolphthalein two drops to 0.1N hydrochloric acid standard solution titration to red disappear is the end. Discussion on the analysis method of sodium hydroxide in plating solution Adopting DE additive cyanide-free alkaline zincate zinc plating is a new process promoted in the whole country, which has the advantages of low cost, good plating quality and non-toxicity. Alkaline galvanizing solution in the analysis of sodium hydroxide, general information on the use of potassium ferrocyanide eliminate the interference of zinc oxide, barium chloride eliminate carbon