采用“活化-预镀镍”前处理方法，能有效提高镀层的结合力。
The adhesion can be improved greatly with the activation pretreatment and pre-nickel plating.
指针的表面电镀需经过下列几道工序：过滤、去油脂、预镀镍、镀镍，之间还穿插了数次清洗。
The finish of the hand is achieved by electroplating involving several stages: leaching, degreasing, pre-nickelplating and nickelplating, along with numerous rinses.
采用预镀镍的方法，研究了含硅低碳钢预镀镍后与液态锌的反应以及金属间化合物组织的形成和变化规律。
The formation and growth kinetics of the intermetallic compounds through reaction between liquid Zn and low carbon steel containing Si which is treated by electroless pre-plating ni are analyzed.
对摩托车零件电镀采用预镀镍-半光亮镍-光亮镍-镍封-装饰铬的组合镀层工艺，能完全符合质量标准要求。
A coating combination of nickel strike, semi-bright and bright nickel, nickel sealing plus decorative chromium is suggested to provide motorcycle parts with the standard quality finish.
利用SEM观察了活化膜和预化学镀镍层的表面形貌。
The morphology of activation film and pre-electroless Ni coating was analyzed by scanning electron microscope(SEM).
研究了钨表面镀前处理及预镀铬、镍，然后镀金的工艺条件；
The paper studied the pre treatment for electroplating the surface of tungsten and technical conditions for chromate treatment, nickel and gold plating, determined the functions of cladding material.
研究了钨表面镀前处理及预镀铬、镍，然后镀金的工艺条件；
The paper studied the pre treatment for electroplating the surface of tungsten and technical conditions for chromate treatment, nickel and gold plating, determined the functions of cladding material.
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