摘要
将纳米α Al2O3浆料ABN加入基础镀镍液中进行电沉积,获得了Ni α Al2O3纳米复合镀层,并对其工艺条件进行了较详细的研究。结果表明:随着镀液中纳米粉体含量的增加,沉积速率减小,而共析量和耐蚀性都是先增加,达到最大值后下降;随着电流密度的增加,沉积速率和耐蚀性增加,而共析量先增加后下降;随着搅拌强度的增大,3个测定量都是先增加后降低;随着pH值的增大,3个测定量都是先增大,然后达到一定值后几乎保持不变;电镀时间对沉积速度与共析量的影响不明显。确定了适宜的工艺范围:纳米粉体浓度为25～30g/L,电镀时间为10～15min,电流密度为3～4A/dm2,pH值为3 7～4 5,通气搅拌强度为1 8～2 2m3/h,电镀温度为45～55℃。
Ni-α-Al_2O_3 nano-composite coatings were electrodeposited by addition of ABN liquor containing α-Al_2O_3 nanoscale particles to watt nickel plating solution, and electroplating process was studied in detail. Results show that with increase of nano-particles content in solution, deposition rate decreased, whereas nano-particles content in deposit and corrosion resistance increased at first and then decreased;with increase of current density,both deposition rate and corrosion resistance increased; whereas nano-particles content in deposit increased at first and then decreased;with stronger agitation,all measurements increased at first and then decreased; with increase of pH value, all measurements increased at first and then tended to be invariable; less influence of plating time on deposition rate and nano particles content in deposit were observed. Process conditions were optimized as below:nano-powder content in plating solution 25～30g/Lplatingtime10～15 min,current density3～4 A/dm^2,value 3.7～4.5,agitation1.8～2.2 m^3/h,temperature 45～55 ℃.
出处
《电镀与涂饰》
CAS
CSCD
2003年第5期7-12,53,共7页
Electroplating & Finishing
关键词
纳米复合电镀
镀镍
Α-AL2O3
nano composite plating
nickel plating
α-Al_2O_3
particle
