锌-铁合金镀液及镀层中锌、铁的快速测定  

Rapid Determination of Zince and Iron in Zn-Fe Alloy Coating and Plating Solution

作　　者：侯燕[1] 曾兴顺 郭荣钊 仝湘滨 

机构地区：[1]湖南省矿产测试利用研究所,湖南长沙410007 [2]深圳市宇宏科技发展有限公司,广东深圳518117

出　　处：《电镀与精饰》2004年第4期35-37,共3页Plating & Finishing

摘　　要：为了获得耐蚀性良好的锌-铁合金镀层,必须维持镀液中锌、铁含量在一定的工艺范围内。采用EDTA滴定和分光光度相结合的方法测定碱性锌-铁合金镀液中的锌、铁含量,并优选出最佳测量波长。研究了酸度、显色剂浓度、共存组分及干扰元素对测量结果的影响;结果表明:铁在0～6μg/mL范围内遵守比尔定律。该方法简便快速、准确度高能满足实际生产的要求。Zinc and iron content in zinc-iron alloy plating bath is maintained in a suitable range so that corrosion resistant zinc-iron alloy deposit can be obtained. Zinc and iron content in zinc-iron alloy plating bath are determined by the combined method of titration with EDTA and spectrophotometry. Optimum measuring wave length was selected. The effect of acidity, chromogenic agent, co-existing bath components and interfering elements on the measurement was studied. Results show that the measured curve of absorbance to iron content follows Beer's Law in iron content range of 0～6 μg/mL。 The method is simple, rapid, and has high accuracy, which meets the demand of practice.

关 键 词：锌-铁合金镀液 镀层 锌 铁 快速测定 电镀 分光光度法 EDTA滴定法 

分 类 号：TQ153.2[化学工程—电化学工业]