主要对比研究了镍磷镀膜、镍钨磷镀膜以及镍磷和镍钨磷双层复合镀膜的耐蚀性能。

The composed films which was electroplated with Ni P and Ni W P was studied by the comparative method.

youdao

介绍了应用DV - 4光电光谱仪，仅用一种测定条件，测定高合金钢中碳、硫、磷、锰、硅、铬、镍、钼、钒、钨、钛、铌、铝元素的含量的方法。

The method of measuring c, s, p, Mn, Si, Cr, Ni, Mo, V, W, ti, Nb, Al element content by DV-4 photoelectric spectroscope on one condition is introduced.

youdao

介绍了镍钨镀层、镍钨硼（磷）镀层、含钨复合镀层和含钨电刷镀镀层等的研究与开发的近期进展。

The paper present the new developments of Ni-W coat, Ni-W-B coat, tungsten composite coat and tungsten brush coat etc.

youdao