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。
Cylindrical anodes are conventionally used for chromium plating on surface of cylindrical articles.
圆柱形工件外表面镀铬常采用圆桶形阳极。
A rotary rack for chromium plating on surface of cylindrical articles was developed.
研制出一种用于圆桶形工件镀铬的旋转挂具。
In simple terms, plating is required in the surface of the iron and steel materials to be plated with a layer of chromium coating.
简单来说，电镀就是需要在钢铁材料的表面镀上一层较厚的铬镀层。
The deduction is confirmed by establishing self locking conditions and determining the sliding friction coefficients between sand and chromium plating layer and between sand and nitrided surface.
通过建立砂粒自锁条件及实测长石砂岩、石英砂岩与泵筒镀铬层或氮化层的滑动摩擦系数值，证实了对柱塞拉伤失效原因的推测是正确的。
The invention relates to a piston ring and a surface spongy chromium plating technique thereof.
一种活塞环及其表面松孔镀铬工艺。
Laser quenched groove surface has high wear resistance, and its wear resistance is higher than that of groove by using high frequency quenching and chromium plating method.
激光淬火的环槽表面具有良好的耐磨性，比原高频淬火和镀铬工艺处理的耐磨性有较大提高。
Laser quenched groove surface has high wear resistance, and its wear resistance is higher than that of groove by using high frequency quenching and chromium plating method.
激光淬火的环槽表面具有良好的耐磨性，比原高频淬火和镀铬工艺处理的耐磨性有较大提高。
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