The method was characterized by easy operation, rapid measurement, and good accuracy, and could be readily used to monitor the nickel impurity in the chromium-plating bath.

本方法简单、快速而准确，能够满足对镀铬溶液中镍杂质监控的要求。

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There are a series of problems in batch production of plating chromium for lining inner bores of input tube in oil well pump such as parameter choice, clamp design, bath care and adjust.

油井抽油泵输入泵衬套内孔尺寸镀铬批量生产中存在着工艺参数准确选择、夹具合理设计、槽液维护和调整等一系列问题。

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The plating technology, bath formular, technological conditions and the coating properties of electrodeposited colourful chromium film in the low-chromium acid were introduced.

介绍了低铬酸电沉积彩色铬膜工艺及其膜层性能、电解液的最佳配方和工艺条件。

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