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汉语拼音：dù céng

1.镀（如电镀）在金属底子上面的极薄的，通常为贵重金属的表层。

2.装饰性或保护性的外部镀层。

3.为了好看或储藏而涂在某些物品上的一层稀薄的金属或为仿造某种贵重金属，在普通金属的表面镀上这种贵重金属的薄层。

• Specific approach is to see rough diamond has no place, not worn on the hands difficult feeling to be glittering surface of the coating.

  具体的做法是，看钻戒有没有毛糙的地方，戴在手上没有棘手的感觉，表面的镀层要金光闪闪。

• But in an attempt to liven up the Baja, it ladled on plastic body cladding and painted early models a garish silver and yellow.

  不过它车身的塑料镀层太多，而且早期车型喷涂的银色加黄色的车漆搭配也太乍眼了。

• Results showed that the corrosion resistance of coating being heat-treated was prefer to that of without heat treatment.

  结果表明，高温热处理后的镀层耐蚀性优于镀态。

• The fretting wear properties of the composite coating was investigated and compared with that of steel substrate.

  考察了该复合镀层微动磨损性能，并与基体微动磨损性能进行了比较。

• The surface qualities and adhesion of the coatings obtained with several common acids and coordinating agents were compared.

  比较了几种常见酸和配位剂所获得的镀层的表面质量、结合力。

• The experimental results showed that the wear performance of composite coating was 1. 3-2. 5 times of that of the pure nickel coating.

  磨损实验结果表明，纳米颗粒复合刷镀层的耐磨损性能是纯镍刷镀层的1.3~2.5倍。

• The salt solution is to point to in the cathode can be deposited required of the metal coating the salt, used to provide a metal ions.

  主盐是指镀液中能在阴极上沉积出所要求镀层金属的盐﹐用于提供金属离子。

• The coating is in silver gray and half-bright, and the nickel coating has no pinhole, no pit and good bonding force.

  镀层呈银灰色半光亮镀层，镍层无针孔、无麻点、结合力好。

• Bubbling and peeling on chemical nickel coating cause fast erosion of no coating part. The appearance can't emerge in the surface treatment.

  化学镀镍层起泡脱皮会导致无镀层部位的加速腐蚀，在表面处理中是不允许出现的。