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。

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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。

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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。

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