Ni-W-Fe-Co合金代铬电镀工艺的研究  

Study on the Plating Process of Ni-W-Fe-Co Alloy as Chrome Alternative Coating

作　　者：周保平 邓正平 田志斌 詹益腾 郭艳红 

机构地区：[1]广州市三孚化工有限公司,广东广州510663

出　　处：《电镀与精饰》2012年第12期6-10,共5页Plating & Finishing

摘　　要：研究了工艺条件对镍-钨-铁-钴合金镀层组分、显微硬度及阴极电流效率的影响。结果表明,镀液θ为60～70℃、pH为6.0～6.5、Jκ为2～10A/dm2、15～25mL/L调色剂,在此条件下得到的合金镀层效果最接近硬铬镀层;提高镀液θ和pH,增加调色剂质量浓度,有利于阴极电流效率的提高;升高镀液θ,提高Jκ和镀液中调色剂的质量浓度,降低镀液pH,镀层中的钨和显微硬度增加。还研究了热处理工艺对镀层显微硬度的影响,在350～400℃条件下热处理3h,镀层显微硬度可达1 065 HV。The effects of operating conditions on the coating composition, microhardness and cathodic current efficiency of Ni-W-Fe-Co alloy deposits were studied in this paper. The results show that the effect of alloy coating is closest to hexavalent chromium coating in the following conditions：the pH value 6.0 6.5, the temperature 60 ～ 70 ℃, the current density 2～10 A/dm^2, and the toner concentration ranges 15 -25 mL/L. The cathode current efficiency will be improved by increasing the toner concentration ,pH value and temperature in the bath;And the tungsten content in the deposit and the coating microhardness are enhanced by increasing the toner concentration in the bath, cathode current density and temperature. In addition, the effect of heat treatment on the coating microhardness was also studied. The results indicate that the microhardness of deposit is 1065 HV after heat treatment at 350 - 400 ℃ for 3 h.

关 键 词：Ni-W-Fe-Co合金 电镀 代铬 显微硬度 热处理 

分 类 号：TQ153.2[化学工程—电化学工业]