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在镀层钢板方面有镀锌板、镀铬板、镀锡板、镀铝板及镀铜板等.对于上述镀板除镀铜板外,在国际上均有了通用的检测镀层方法,而镀铜板检测标准尚未见报道.国内一般采用酸溶解铜层后,用滴定法测定铜量.采用此法缺点是:不可避免地会腐蚀基体铁,这样对一些既要检测镀层而又不破坏基体元件就不太适用.本文经过试验,选择过硫酸铵作氧化剂,氨水作配合剂兼作抑制剂,达到了既退镀铜,又保护基体不被腐蚀的目的.
In the plating of galvanized steel sheet, chrome plate, tin plate, aluminum plate and copper plate, etc. In addition to the above plating plate except copper plating, in the international community have a common method of detection coating, and copper plating test standards have not yet See report.China generally used after the acid solution of copper, the titration method for the determination of copper. The disadvantage of this method is: will inevitably corrode the matrix of iron, so that some should not only detect the coating without damaging the matrix element is not suitable After the experiment, the choice of ammonium persulfate as oxidant, ammonia as a complexing agent also serves as an inhibitor, reaching both the back of the copper, but also the purpose of protecting the substrate from corrosion.