射流电沉积Ni-SiC纳米镀层的腐蚀行为研究  

Corrosion behavior of Ni-SiC nanocoating deposited by jet electrodeposition

作　　者：娄燕敏[1] 孙健[1,2] 夏法锋 LOU Yanmin;SUN Jian;XIA Fafeng(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;Daqing Normal University,Daqing 163712,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]大庆师范学院,黑龙江大庆163712

出　　处：《兵器材料科学与工程》2020年第3期38-42,共5页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(51974089);黑龙江省自然科学基金(LC2018020);大学生创新创业训练计划项目(201910220060)。

摘　　要：为提高Ni-SiC纳米镀层的耐腐蚀性能,采用射流电沉积方法,在Q235钢基体表面制备Ni-SiC纳米镀层。利用FLUENT软件仿真不同喷嘴直径对喷射镀液的速度和动能参数影响,采用扫描电子显微镜、透射电镜、X射线衍射仪和电化学工作站对不同喷嘴直径下喷射电沉积制备Ni-SiC纳米镀层的表面形貌、显微组织、腐蚀行为进行研究。当喷嘴直径为8 mm时,喷射电沉积过程镀液的射流速度和动能较其他喷嘴直径下的大,最大射流速度和动能分别为113 m/s和543 J。此参数下制备的Ni-SiC纳米镀层具有致密、均匀的表面结构,大量SiC纳米颗粒嵌入Ni-SiC纳米镀层,Ni和SiC的平均粒径分别为342 nm和73 nm。结果表明:喷嘴直径对Ni-SiC纳米镀层的腐蚀性能影响较大;当喷嘴直径为8 mm时,Ni-SiC纳米镀层具有最佳的耐腐蚀性能。适宜的喷嘴直径,可提高镀液喷射速率和动能,从而提高Ni-SiC纳米镀层的耐腐蚀性能,得到的Ni-SiC纳米镀层与其他镀层相比组织结构更致密、均匀。In order to improve the corrosion resistance of Ni-SiC nanocoating,Ni-SiC nanocoating was prepared on the Q235 steelby jet electrodeposition. The effects of different nozzle diameters on the velocity and kinetic energy parameters of spray platingsolution were simulated by fluent software. The surface morphology,microstructure and corrosion behavior of Ni-SiC nanocoatingprepared by spray electrodeposition under different nozzle diameters were studied by scanning electron microscope,transmissionelectron microscope,X-ray diffractometer and electrochemical workstation,respectively. When the nozzle diameter is 8 mm,the jet velocity and kinetic energy of the plating solution during spray electrodeposition are significantly higher than those ofother nozzle diameters,and the maximum jet velocity and kinetic energy are 113 m/s and 543 J,respectively. And the Ni-SiCnanocoatings prepared under this parameter have dense and uniform surface structure. A large number of SiC nanoparticles areembedded in Ni-SiC nanocoatings. The average particle sizes of Ni and SiC are 342 nm and 73 nm,respectively. It can be provedthat the nozzle diameter has a great influence on the corrosion performance of Ni-SiC nanocoating,and the experimental resultsshow that the Ni-SiC nanocoating has the best corrosion resistance when the nozzle diameter is 8 mm. So that concludes thesuitable nozzle diameter parameters can significantly increase the spray rate and kinetic energy of the plating solution,and thusimprove the corrosion resistance of Ni-SiC nanocoating. Compared with other coatings,the microstructure of Ni-SiC nanocoatingis more compact and uniform.

关 键 词：射流电沉积 Ni-SiC纳米镀层 喷嘴直径 纳米镀层表征 腐蚀行为 

分 类 号：TH117.1[机械工程—机械设计及理论]