摘要
采用电沉积法在铝基体上制备了镍–碳纳米管复合镀层,探讨了镀液中碳纳米管含量、电流密度、搅拌速率、温度、电镀时间等因素对镀层碳纳米管含量和厚度的影响,得出制备镍–碳纳米管复合镀层的适宜工艺条件为:碳纳米管质量浓度4 g/L,电流密度8 A/dm2,搅拌速率440 r/min,温度40°C,沉积时间40 min。采用扫描电镜和X射线衍射仪对镀层表面形貌和成分进行分析,通过电化学测试比较了不同镀层在不同腐蚀介质中的耐腐蚀性。与纯镍镀层相比,镍–碳纳米管复合镀层的晶粒尺寸更小,表面更粗糙,耐腐蚀性更好。
A nickel-carbon nanotube composite coating was electrodeposited on aluminum substrate. The effects of carbon nanotube concentration in bath, current density, stirring rate, temperature, and deposition time on carbon nanotube content and thickness of the composite coating were studied. The suitable process conditions for preparation of nickel-carbon nanotube composite are as follows： carbon nanotube 4 g/L, current density 8 A/dm2, stirring rate 440 r/rain, temperature 40 ℃, and deposition time 40 min. The surface morphology and composition of the coating were characterized by scanning electronic microscope and X-ray diffractometer. The corrosion resistance of the coating in different corrosive media were examined by electrochemical test. The results showed that the nickel-nanotube composite coating has smaller grain size, rougher surface, and better corrosion resistance than a pure nickel coating.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2014年第5期197-200,共4页
Electroplating & Finishing
关键词
铝
镍
碳纳米管
复合镀层
电沉积
耐蚀性
aluminum
nickel
carbon nanotube
compositecoating
electrodeposition
corrosion resistance
