氯化钾无氰镀镉工艺的边界条件  

Boundary conditions for the cyanide-free potassium chloride cadmium plating

作　　者：郭崇武[1] 詹兴刚 王大铭 代朋民 杨强 杨开迪 Guo Chongwu;Zhan Xinggang;Wang Daming;Dai Pengmin;Yang Qiang;Yang Kaidi(Guangzhou Ultra Union Chemicals Co.,Ltd.,Guangzhou 510460,China;Guizhou Aerospace Seiko Manufacturing Co.,Ltd.,Zunyi 563000,China;AVIC Liyuan Hydraulics Co.,Ltd.,Guiyang 550018,China;AVIC Guizhou Huafeng Electric Appliance Co.,Ltd.,Guiyang 550006,China)

机构地区：[1]广州超邦化工有限公司,广东广州510460 [2]贵州航天精工制造有限公司,贵州遵义563000 [3]中航力源液压股份有限公司,贵州贵阳550018 [4]中航工业贵州华烽电器有限公司,贵州贵阳550006

出　　处：《电镀与精饰》2024年第12期114-119,共6页Plating & Finishing

摘　　要：介绍了氯化钾无氰镀镉工艺的研究开发过程,依据实验室试验与生产实践制定了工艺边界条件。氯化镉25 g/L~35 g/L,氯化钾80 g/L~140 g/L,PULIZIER NCC-617 AC络合剂100 g/L~140 g/L,PULIZIER NCC-617 Base辅助剂25 mL/L~30 mL/L,PULIZIER NCC-617 Bri光亮剂1.5 mL/L~2.5 mL/L,PULIZIER NCC-617 HCD高区光亮剂5 mL/L~10 mL/L,镀槽温度20℃~35℃,pH值7~9,阴极电流密度0.5 A/dm^(2)~1.5 A/dm^(2)(可放宽至0.5 A/dm^(2)~2.0 A/dm^(2)),阴极移动2 m/min~4 m/min,阳极采用镉的质量分数≥99.97%的镉板。在实验室制备钢铁表面无氰镀镉及六价铬彩色钝化样件,进行中性盐雾试验20 064 h样件表面无白锈。本工艺在镀层耐蚀性方面取得了重大进步,具有良好的应用前景。The research and development process of cyanide-free potassium chloride cadmium plating was introduced.The boundary conditions of the process were established according to laboratory experiment and production practice.Cadmium chloride is 25 g/L-35 g/L,potassium chloride 8 g/L-140 g/L,PULIZIER NCC-617 AC complexing agent 100-140 g/L,PULIZIER NCC-617 Base adjuvant 25 mL/L-30 mL/L,PULIZIER NCC-617 Bri brightener 1.5-2.5 mL/L,PULIZIER NCC-617 HCD high zone brightener 5 mL/L-10 mL/L,plating bath temperature is 20℃-35,℃range of pH is 7-9,the cathode current density 0.5 A/dm^(2)-1.5 A/dm^(2)(can be relaxed to 0.5 A/dm^(2)-2.0 A/dm^(2)),the cathode moves 2-4 m/min,and the anode adopts cadmium plate with cadmium mass fraction≥99.97%.The samples of cyanide-free cadmium plating and chromium-hexavalent color passivation on the surface of steel were prepared in the laboratory,and no white rust was found on the surface of the samples after the neutral salt spray test 20064 h.This process has made great progress in the corrosion resistance of the coating and has a good application prospect.

关 键 词：无氰镀镉 氯化镉 氯化钾 络合剂 光亮剂 辅助剂 边界条件 镀层耐蚀性 

分 类 号：TQ153[化学工程—电化学工业]