常季,陈吉,崔霄.脉冲电沉积WC-Co-Ni镀层的制备及性能的研究[J].表面技术,2015,44(11):35-39,51.
陈吉.Pulse electrodeposition of WC-Co-Ni coating preparation and performance of the research[J].Surface Technology,2015,44(11):35-39,51
脉冲电沉积WC-Co-Ni镀层的制备及性能的研究
Pulse electrodeposition of WC-Co-Ni coating preparation and performance of the research
投稿时间:2015-09-20  修订日期:2015-11-02
DOI:
中文关键词:  脉冲电沉积  WC-Co-Ni镀层  形核  显微硬度  脉冲参数  腐蚀速率  均匀弥散
英文关键词:Pulse electrodeposition  WC-Co-Ni coating  Nucleation  Microhardness  Pulse parameters  Corrosion rate  Uniform dispersion
基金项目:辽宁省自然科学(201202127) Fund: liaoning province natural science fund project (201202127)
作者单位
常季 辽宁石油化工大学机械工程学院 
陈吉 辽宁石油化工大学机械工程学院 
崔霄 辽宁石油化工大学机械工程学院 
AuthorInstitution
陈吉  
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中文摘要:
      目的采用脉冲电沉积的方法制备碳化钨-钴-镍(WC-Co-Ni)纳米晶复合镀层。方法通过XRD,SEM,EDS和硬度分析等手段对镀层的结构、表面形貌、元素成分、显微硬度进行测试,最后采用浸泡实验的方法对WC-Co-Ni纳米晶复合镀层和304不锈钢在5% H2SO4溶液进行腐蚀速率计算。结果结果表明:当脉冲参数为阴极电流密度5A/dm2,脉冲占空比50%,脉冲频率2000Hz时,施镀时间2h,制备的WC-Co-Ni复合镀层为纳米晶结构,WC-Co纳米颗粒起到了促进形核作用,晶粒尺寸大多分布在20nm左右;WC-Co纳米颗对镀层起到弥散强化作用,使复合镀层的显微硬度为600HV,高于传统的不锈钢材料(210HV);浸泡试验结果表明,WC-Co-Ni复合镀层的耐蚀性优于304不锈钢,温度由20℃~80℃,复合镀层腐蚀速率变化缓慢,20℃腐蚀速率仅为0.4192mm/a,80℃也低于20mm/a。镀层表面平整、光亮无裂纹.结论镀层由立方晶型的Ni,六方结构的WC和立方晶型的Co组成,WC-Co颗粒均匀弥散在纳米晶Ni镀层内并且镍、钨、碳与钴的原子重量百分比为6:2:1:1。
英文摘要:
      Objective Using pulse electrodeposition method preparation of tungsten carbide nickel -cobalt-(WC-Co-Ni) nanocrystalline composite coating. Methods By XRD, SEM, EDS, and hardness analysis methods such as the structure of the coating, surface morphology, elemental composition, microhardness test, finally adopts the method of immersion test of WC-Co-Ni nanocrystalline composite coating and 304 stainless steel corrosion rate in 5% of H2SO4 solution is calculated. Results Results show that the pulse parameters for 5 A/dm2 cathodic current density, pulse duty ratio 50%, the pulse frequency of 2000 Hz, the plating time is 2 hour, preparation of WC- Co- Ni composite coating for nanocrystalline structure, WC-Co nanoparticles have playing an important role to promote nucleation and grain size distribution mostly in about 20 nm; WC - Co nanoparticles on the coating dispersion strengthening effect, making the microhardness of the composite coating 600 HV, higher than that of traditional stainless steel (210 HV); Soak test results show that WC - Co - Ni composite coating corrosion resistance is better than that of 304 stainless steel, the temperature of 20 ℃ ~ 80 ℃, composite coating corrosion rate is slow, 20 ℃ corrosion rate of only 0.4192 mm/a, 80 ℃ is less than 20 mm/a. Coating surface smooth, no crack light. Conclusion Ni coating by cubic shape, the structure of the six-party of WC and cubic type Co,WC - Co particles uniform dispersion in nanocrystalline Ni plating and nickel, tungsten, carbon and atomic weight percentage of cobalt for 6:2:1:1.
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