节水型无氰碱性镀锌工艺及其维护
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摘要
介绍了一种节水型无氰碱性镀锌工艺,主要工艺流程有:化学除油,电解除油,超声波电解除油,酸蚀,酸活化,终端电解,无氰碱锌,出光,三价铬钝化,封闭。介绍了各工序的溶液组成、工艺参数和维护方法。详述了无氰碱锌工艺线的节水方案。分析了镀层结合力不良、发雾、麻点、光亮度不足等故障产生的原因,并给出了相应的解决办法。
A water-saving cyanide-free alkaline zinc electroplating process was introduced.The process flow is mainly composed of chemical degreasing,electrolytic degreasing,ultrasonic electrolytic degreasing,pickling,acid activation,terminal electrolysis,cyanide-free alkaline zinc plating,bright dipping,trivalent chromium passivation,and sealing.The bath composition,operation conditions and maintenance methods of different procedures were presented.A scheme for water saving in cyanide-free alkaline zinc electroplating production line was described.The causes of some defects of zinc coating such as poor adhesion,fogginess,pitting,and low brightness were analyzed and their countermeasures were given.
A water-saving cyanide-free alkaline zinc electroplating process was introduced.The process flow is mainly composed of chemical degreasing,electrolytic degreasing,ultrasonic electrolytic degreasing,pickling,acid activation,terminal electrolysis,cyanide-free alkaline zinc plating,bright dipping,trivalent chromium passivation,and sealing.The bath composition,operation conditions and maintenance methods of different procedures were presented.A scheme for water saving in cyanide-free alkaline zinc electroplating production line was described.The causes of some defects of zinc coating such as poor adhesion,fogginess,pitting,and low brightness were analyzed and their countermeasures were given.
引文
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[2]安成强,崔作兴,郝建军.电镀三废治理技术[M].北京:国防工业出版社,2002:1-29.
[3]屠振密,韩书梅,杨哲龙.防护装饰性镀层[M].北京:化学工业出版社,2003:142-143.
[4]沈品华,屠振密.电镀锌及锌合金[M].北京:机械工业出版社,2001:46-59.
[5]袁诗璞.镀锌三价铬钝化应用的若干问题[J].涂装与电镀,2011(1):32-37,44.
[6]詹益腾.高性能碱性无氰光亮镀锌的使用和维护[J].电镀与涂饰,2014,34(3):141-144.
[7]王燕.碱性无氰镀锌现状及未来发展方向[C]//第三届渤海表面精饰论坛论文集.[出版地不详:出版者不详],2014:334-337.
[8]马冲.无氰镀锌技术的发展和工业应用现状[J].电镀与涂饰,2011,30(6):46-49.
[9]张允诚,胡如南,向荣.电镀手册[M].3版,精装版.北京:国防工业出版社,2008:15-19,96-106.