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硫脲是一种含硫基的有机增光剂,在氨三乙酸—氯化铵镀锌溶液中加进适量硫脲能增大阴极极化,使镀层细致光亮。定期分析硫脲以控制其在镀液中的含量对保证镀件质量有着重要的意义。对于硫脲的分析方法,我们在“常用电镀溶液的分析”《武汉材料保护研究所主编,76年12月份版本》一书的基础上作了大胆的改进。本厂的生产实践证明所拟方法切实可行,能满足车间生产的需要,兹将具体操作方法介绍如下,供有关人员参考。
Thiourea is a thio-containing organic optical brightener. Adding appropriate amount of thiourea to the nitrilotriacetic acid-ammonium chloride zinc plating solution can increase cathodic polarization and make the coating bright and beautiful. Regular analysis of thiourea to control its content in the bath to ensure the quality of plating is of great significance. For the analysis of thiourea, we made a bold improvement on the basis of the book “Analysis of Common Plating Solutions”, “Wuhan Institute of Materiel Protection, December 2006 edition”. Our production practice has proved that the proposed method is feasible and can meet the needs of the workshop production, hereby introduce the specific methods of operation are as follows, for the reference of the relevant personnel.