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- Keywords trivalent chromium bath;hard chromium coating;hardness;wear resistance;corrosion resistance; 三价铬镀液;硬铬;硬度;耐磨性;耐蚀性;
- trivalent chromium coating 三价铬镀层
- The history of trivalent chromium electroplating was looked back. 回顾了三价铬镀铬的历史。
- One such crystal is the ruby, which contains trivalent chromium ions dispersed in a matrix of alumina. 这样的晶体有一种叫“红宝石”，它包含的三价铬离子弥散在氧化铝的基体中。
- The hazards of hexavalent chromium electroplating, and the benefits of trivalent chromium electroplating were analyzed. 分析了六价铬电镀的危害及三价铬电镀的优点,以及三价铬电镀取代六价铬电镀带来的效益。
- The development history of trivalent chromium passivation for zinc plating was overviewed. 概述了镀锌三价铬钝化的发展历程。
- The major advantages and disadvantages of trivalent chromium electroplating were introduced. 介绍了三价铬镀铬的主要优点与缺点。
- The chromium deposition velocity of trivalent chromium electroplating was researched. 对三价铬电解液镀铬的沉积速度进行了实验研究。
- Hexavalent chromium is the most toxic form, the toxicity of trivalent chromium than 100 times. 六价铬是毒性最大的形态，其毒性比三价铬高100倍。
- trivalent chromium passivation coating 三价铬钝化膜
- The coating has two layers: a thin chromium coating covered by a chromium mixed oxide layer. 涂层有两个层次：一个薄铬涂层覆盖，铬混合氧化物层。
- The mechanisms and prospect of trivalent chromium plating were introduced.And some problems that should be deeply studied were pointed out. 还介绍了三价铬电镀的机理及展望，并提出了有待深入研究的问题。
- The effect of heat diffusion treatment on wear-resistant properties of the electroplated hard chromium coat were studied. 研究了热扩散处理工艺对电镀硬铬层耐磨性的影响。
- Trivalent chromium electroplating not only can reduce pollution obviously and save pollution treatment cost, but also can improve the quality of electroplating products. 三价铬电镀不仅可明显减少电镀对环境的污染,节省大量的污染治理费用,而且还可提高电镀产品的质量。
- Li J F,Dai W W,Ding C X.Tribological properties of plasma sprayed chromium carbide-nickel chromium coating[J].Tribology,1996,1(16):14-20. [2]李剑锋;戴玮玮;丁传贤.;等离子喷涂碳化铬-镍铬涂层的摩擦学特性[J]
- The dependence of VMD performances on the membrane material and membrane pore sizes resulted mostly from different oxidation ability of hexavalent chromium and trivalent chromium. 详细考察了两种膜材料在减压膜蒸馏技术分离含铬溶液过程中的应用性能，发现由于溶液中六价铬和三价铬的氧化性不同，从而对膜材料和膜孔径的要求也有所不同；
- After trivalent chromium was oxidized and became hexavalent chromium, titanium can be precipitated and separated from chromium-nickel-vanadium solution under ammonia condition. 在一定条件下使三价铬氧化成6价铬,再在氨性条件下使钛沉淀,大量铬、镍留在溶液中。
- Corresponding relations between the current density and the morphology of chromium coating of piston rods for shock absorber were investigated and established in this paper. 通过对汽车减振器连杆电流密度与镀铬层组织形态的研究找到其对应关系,进行盐雾试验得到了优化的电流密度参数。
- The trivalent chromium passivation film based on zincate plating obtained has compact structure with no obvious crack, and excellent anticorrosion performance. 结果表明：锌酸盐镀锌层的三价铬钝化膜表面结构致密、无明显裂纹，具有较好的耐腐蚀性能；
