在超声场中采用脉冲沉积法制备了Ni-ZrO2-CeO2二元纳米复合镀层。镀液组成和基础工艺条件为：氨基磺酸镍300 g/L， H3BO330 g/L，NH4Cl 5 g/L，润湿剂0.15 g/L，ZrO220 g/L，CeO235 g/L，温度(45±2)°C，pH 3.8±0.1，时间2 h。研究了平均电流密度、占空比和脉冲频率等对Ni-ZrO2-CeO2复合镀层中纳米颗粒含量的影响。采用静态浸泡法研究了不同脉冲参数下制备的纳米复合镀层在10%H2SO4溶液中的耐腐蚀性。结果表明，在平均电流密度4 A/dm2、占空比0.4、频率1000 Hz条件下脉冲电沉积时，Ni-ZrO2-CeO2复合镀层中纳米颗粒的含量最高，表面最细致。超声波的引入使复合镀层中纳米颗粒的含量有少许降低，但能细化晶粒，提高复合镀层的耐腐蚀性能。Ni-ZrO2-CeO2复合镀层的耐腐蚀性优于相同工艺条件下制备的纯Ni、Ni-ZrO2以及Ni-CeO2镀层。
A Ni-ZrO2-CeO2 binary nanocomposite coating was prepared by pulsed electrodeposition under ultrasonic condition from the bath containing nickel sulfamate 300 g/L, H3BO3 30 g/L, NH4Cl 5 g/L, wetting agent 0.15 g/L, ZrO2 20 g/L, and CeO2 35 g/L at temperature (45 ± 2) °C and pH 3.8±0.1 for 2 h. The effects of average current density, duty cycle, and pulse frequency on the nanoparticle content of Ni-ZrO2-CeO2 composite coating were studied. The corrosion resistance of the nanocomposite coatings prepared under different pulse parameters in 10%H2SO4 solution was tested by static immersion method. The results showed that the Ni-ZrO2-CeO2 composite coating obtained at average current density4 A/dm2, duty cycle 0.4, and pulse frequency 1 000 Hz has highest nanoparticle content and the most compact surface. The introduction of ultrasound reduces the nanoparticle content of Ni-ZrO2-CeO2 composite coating slightly, but refines the grains and improves the corrosion resistance of the composite coating. Ni-ZrO2-CeO2 composite coating has better corrosion resistance than pure Ni, Ni-ZrO2, and Ni-CeO2 coatings prepared under the same process conditions.
参考文献
| [1] | Denny Thiemig;Andreas Bund;Jan B. Talbot .Influence of hydrodynamics and pulse plating parameters on the electrocodeposition of nickel-alumina nanocomposite films[J].Electrochimica Acta,2009(9):2491-2498. |
| [2] | 张柏林,王英波,鲁雄,周先礼,屈树新,冯波,翁杰.脉冲电化学沉积法制备钛基HA/Ag复合涂层[J].稀有金属材料与工程,2010(10):1835-1839. |
| [3] | 向国朴.脉冲电镀发展概况[J].电镀与涂饰,2000(04):43-47. |
| [4] | Huan-Yu Zheng;Mao-Zhong An .Electrodeposition of Zn-Ni-Al_2O_3 nanocomposite coatings under ultrasound conditions[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):548-552. |
| [5] | 申晨 .超声场中电沉积二元纳米复合镀层的试验研究[D].河南科技大学,2009. |
| [6] | N. S. Qu;K. C. Chan;D. Zhu .Pulse co-electrodeposition of nano Al_2O_3 whiskers nickel composite coating[J].Scripta materialia,2004(8):1131-1134. |
| [7] | 胡双丽 .纳米复合镀层的脉冲电沉积制备工艺及性能研究[D].昆明:昆明理工大学,2008. |
| [8] | 朱荻,张文峰,雷卫宁.基于电沉积技术的纳米晶材料晶粒细化工艺研究[J].人工晶体学报,2004(05):765-769. |
| [9] | 孙雅茹,于锦,周凯.稀土元素在化学镀Ni-P中作用的研究[J].沈阳工业大学学报,2001(04):292-294. |
| [10] | 胡振峰,徐滨士,董世运.镀液中纳米颗粒浓度对n-Al2O3/Ni复合电沉积的影响[J].中国表面工程,2006(z1):199-202. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%