脉冲电镀Ni-纳米ZrO_2的最佳工艺及镀层性能  

Optimization of Process for Pulse Electroplating of Nickel /Nano-Zirconium Dioxide Composite Coating and Corrosion Resistance of the Composite Coating

作　　者：王琳[1] 孙本良[1] 李成威[1] 

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《材料保护》2014年第1期37-39,9,共3页Materials Protection

基　　金：辽宁省教育厅重点实验室资助项目(2008S123)

摘　　要：为了提高脉冲电镀Ni-纳米ZrO2层的硬度和耐蚀性,采用正交试验法优选了脉冲频率、占空比和纳米ZrO2粒子的质量浓度。分别采用HBRV-187硬度计、AutoLab PGSTAT302型电化学工作站、JSM-6408LV扫描电镜及其附带的能谱仪测试了Ni-纳米ZrO2复合镀层的硬度、耐蚀性、微观形貌和成分。结果表明:最优工艺条件为脉冲频率1 500 Hz,占空比60%,纳米ZrO2粒子浓度7 g/L;Ni-纳米ZrO2复合镀层晶粒细小、表面平整、显微组织致密、均匀,其硬度和耐蚀性比纯镍镀层均有明显的提高。For the purpose of improving the hardness and corrosion resistance of pulse electroplated nickel / nano- ZrO2composite coating,orthogonal test method was adopted to optimize the pulse frequency,duty cycle,and concentration of ZrO2nanoparticles.The hardness and corrosion resistance of the composite coating were determined with a hardness meter and an electrochemical workstation. Moreover,the morphology and elemental composition of as-plated Ni / nano-ZrO2composite coating were analyzed with a scanning electron microscope and an energy dispersive spectrometer,respectively. Results indicated that the optimized technological conditions were pulse frequency of 1 500 Hz,duty cycle of 60%,and ZrO2nanoparticle concentration of 7 g / L.Corresponding Ni / nano-ZrO2composite coating obtained under the optimized pulse electroplating condition was smooth and consisted of fine grains and uniform microstructure,and its hardness and corrosion resistance were much higher than those of pulse electroplated Ni coating.

关 键 词：脉冲电镀 Ni-纳米ZrO2 镀层硬度 耐蚀性 微观形貌 

分 类 号：TQ153[化学工程—电化学工业]