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提供一种用于瓦特镀镍液的新光亮剂。这种化合物是吡啶-4-羧酸酰肼和丙烯腈在乙醇溶液里反应的产物,它能引起镍镀层高的光亮度和高的内应力。研究了镀层质量和电镀参数之间的关系,指出在一定的条件下能够得到十分光亮的镀层。镀层的内应力只取决于本身的厚度,从含有新光亮剂的镍镀液里镀取內应力大约为39公斤力/毫米~2的镍镀层,再在常规六价铬镀液里镀铬,这样能够得到微裂纹镀层。
A new brightener for use in Watts nickel plating solution. This compound is a product of the reaction of pyridine-4-carboxylic acid hydrazide and acrylonitrile in ethanol solution, which causes high brightness and high internal stress of nickel plating. The relationship between coating quality and plating parameters is studied, and it is pointed out that under certain conditions, a very bright coating can be obtained. The internal stress of the coating depends only on the thickness of the coating. A nickel coating having an internal stress of about 39 kgf / mm2 is plated out from the nickel plating bath containing the new brightener and then chromed in a conventional hexavalent chromium plating bath Micro-crack plating can be obtained.