Special treatment is recommended to activate beryllium copper surface before chromium plating. And special steps which differ from conventional chromium plating on steel parts are to be taken.
在铍青铜合金上电镀铝，需在镀铝前作特殊的表面活化处理，镀铬时也有不同于钢铁件镀铬的操作方法。
A kind of composite additive used for copper plating of chemical replacement on iron surface was investigated.
研究了一种用于钢铁基体化学置换镀铜的专用复合添加剂。
The plating copper is a key process in the production of PCB, which involves the quality assurance of metallization of PTH holes and laminate surface, and is affected by a number of factors.
电镀铜是PCB加工过程中的一个关键工艺流程，涉及到孔和板面金属化的性能保证，影响因素众多。
The fiber is firstly coated with a thin copper or nickel plate with electroless plating method. Then, a thicker nickel plate is coated on the surface of the conductive layer.
提供了保护过程的技术细节，首先在光纤表面进行化学镀处理获得导电的薄镍层或铜层，然后在该导电层上进行电镀镍。
It can be used for electroless tin plating on copper substrate in electronic element, surface mounting device and PCB.
结果表明 ：该工艺镀液稳定 ，可用于电子元器件以及表面安装器件、印制电路板等铜基上化学镀锡。
The techniques for surface are plating nickel, zinc, gold, silver, copper, the wreath oxygen resin spraying and the heat disposing etc.
表面处理有镀叻、锌、金、银、铜、煲黑、环氧树脂喷涂及热处理等；
Tin plating: Immediately after copper plating, a thin layer(0003") of tin is electroplated on the surface of the copper. Tin will act as an etch resist in a future manufacturing process."
镀锡：镀铜后在铜表面再镀上一层锡，大约3mil厚，在下工序中起到抗蚀保护线路的作用。
The coatings of nickel-phosphor and nickel-copper-phosphor are prepared on the pretreated metal surface by electroless plating technology. The coating surface has been characterized by XPS and SEM.
采用化学镀技术在预处理后的金属表面上制备镍磷二元和镍铜磷三元镀片，用X射线光电子能谱分析仪和扫描电镜分别对镀片表面的元素价态、组成及镀片表面的形貌进行表征。
The reaction of chemical replacement copper plating on iron surface and profile of the coating have been investigated by electrochemical methods and scan electron microscopy.
用电化学方法和扫描电子显微镜研究了钢铁置换镀铜反应及镀层形貌，结果表明：钢铁表面的置换铜镀层总是多孔的。
It is suitable for transition connection of the electric appliance of indoors distributing device and kinds of wire cables. It adopts T2 red copper, the surface adopt nickle plating.
适用于户内配电装置中电气设备和各种电线电缆的过渡连接，采用T2紫铜板制造，表面镀镍。
It is suitable for transition connection of the electric appliance of indoors distributing device and kinds of wire cables. It adopts T2 red copper, the surface adopt nickle plating.
适用于户内配电装置中电气设备和各种电线电缆的过渡连接，采用T2紫铜板制造，表面镀镍。
应用推荐