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机械、电器工厂电镀车间(或工段)的镀铬生产,一般镀件量不大但品种繁多,同时镀铬槽又经常兼镀亮铬和硬铬的任务。若能结合地区气候、产量等具体条件,采用间歇式逆流清洗流程并适当地改进电镀工艺,就可达到不排水或少排水的目的,且能回收随水流失铬酐的95％以上。这种方法,有投资较少、上马较快、操作较简单等优点;主要缺点是增加清洗槽后就相应加多了工序和加大了劳动强度(对手工操作的镀槽而言)。但在镀件量不大的情况下,上述缺点的影响是不大的。我们院从1979年2月到1980年12月,在西安高压开关厂进行了近半年的试验和一年的生产运
Chromium plating production in electroplating workshops (or sections) of mechanical and electrical factories is generally not large but the variety of plating parts is large. At the same time, chromium plating baths are frequently used for the tasks of bright chromium plating and hard chromium plating. If we can combine specific conditions such as regional climate and production, use intermittent counter-current cleaning process and improve the electroplating process appropriately, we can achieve the goal of undrained or less drainage, and can recover more than 95% of chromic anhydride with water loss. This method has the advantages of less investment, faster installation, simpler operation, etc. The main disadvantage is that after the cleaning tank is added, more processes are added and labor intensity is increased (for the manually operated plating tank). However, in the case of a small amount of plating, the above-mentioned drawbacks have little effect. From February 1979 to December 1980, our institute conducted a trial and a year of production and transportation in the high-voltage switchgear factory in Xi’an.