脉冲电沉积参数对Ni-TiN纳米镀层耐蚀性影响  

Effect of pulsed electrodeposition parameters on corrosion resistance properties of Ni-TiN nanocoating

作　　者：夏法锋[1,2] 赵旭东 马春阳 周云光[2] 于航 张红哲 XIA Fafeng;ZHAO Xudong;MA Chunyang;ZHOU Yunguang;YU Hang;ZHANG Hongzhe(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,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]东北大学秦皇岛分校控制工程学院,河北秦皇岛066004

出　　处：《兵器材料科学与工程》2020年第5期1-4,共4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(201910220060)。

摘　　要：用脉冲电沉积技术制备Ni-TiN纳米镀层,用中性盐雾试验法腐蚀纳米镀层,后使用电化学工作站测试Ni-TiN纳米镀层的耐腐蚀性能,用扫描电镜(SEM)和能谱仪(EDS)对脉冲电沉积制得镀层显微组织结构进行测试分析,以此确定Ni-TiN纳米镀层制备过程中脉冲电沉积参数对该镀层耐腐蚀性的影响。结果表明:随电沉积电流密度增大,占空比增加,镀层中TiN粒子复合量先增大后减小,极化曲线中自腐蚀电位逐渐偏向正电位而后逐渐远离。在沉积电流密度为2.5 A/cm^2、占空比为50%时获得的纳米镀层在腐蚀试验通过SEM进行观察,此工艺参数下制备的镀层微观形貌表现更佳,耐腐蚀性最优。说明适宜的脉冲电沉积参数可显著提高Ni-TiN纳米镀层中TiN粒子的复合量和镀层的耐腐蚀性。经EDS分析证实,Ni-TiN纳米镀层的耐腐蚀性与镀层中TiN粒子复合量呈正相关。Ni-TiN nanocoating was prepared by pulse electrodeposition technology,and the neutral salt spray test was used to corrode the nanocoating. The corrosion resistances of Ni-TiN nanocoating were tested by electrochemical workstation. The microstructure of the coating was tested by SEM and EDS to determine the preparation process of Ni-TiN nanocoating. The effect of electrodeposition parameters on the corrosion resistance of the coating was studied. The results show that with the increase of electrodeposition current density and duty cycle,the TiN content in the coating increases first and then decreases,and the selfcorrosion potential in the polarization curve gradually deviates from the positive potential and then moves away from it. Under the condition of deposition current density of 2.5 A/cm^2 and duty cycle of 50%,the nanocoating is observed by SEM in corrosion test. Compared with the micro morphology of the coating prepared under other process parameters,this process parameter has better performance and the best corrosion resistance. This shows that the proper parameters of pulse electrodeposition can significantly improve the composite amount of TiN particles and the corrosion resistance of the coating. EDS analysis shows that the corrosion resistance of Ni-TiN nanocoating is positively correlated with the TiN content in the coating.

关 键 词：脉冲电沉积 工艺参数 Ni-TiN纳米镀层 耐腐蚀性 纳米镀层表征 

分 类 号：V261.5[航空宇航科学与技术—航空宇航制造工程]