电沉积方式对Ni-SiC纳米复合镀层性能的影响

发布时间：2018-03-29 18:26

本文选题：直流电沉积　切入点：脉冲电沉积　出处：《表面技术》2017年06期

【摘要】：目的通过研究电沉积方式对Ni-SiC纳米复合镀层性能的影响,进而改善Ni-SiC纳米复合镀层的性能。方法采用直流电沉积和脉冲电沉积分别制备Ni和Ni-SiC纳米复合镀层,使用扫描电镜和能谱仪研究镀层的表面形貌和成分,通过测量施镀前后镀件质量差计算沉积速率,采用硬度计测量了镀层的硬度,利用极化曲线和电化学阻抗方法研究镀层在3.5%NaCl水溶液中的耐腐蚀性能,分析了直流电沉积方式和脉冲电沉积方式对镀层各项性能的影响。结果脉冲电沉积方式制备的Ni-SiC纳米复合镀层的表面形貌更加致密、均匀、光滑,镀层硬度为616.3HV,自腐蚀电流为9.56×10~(-6) A,比直流电沉积制备的Ni-SiC纳米复合镀层的硬度和耐蚀性能均有所提高。结论电沉积方式对复合镀层的性能有很大影响,脉冲电沉积方式制备的Ni-SiC纳米复合镀层具有更好的性能。
[Abstract]:Objective to study the effect of electrodeposition on the properties of Ni-SiC nanocomposite coatings and to improve the properties of Ni-SiC nanocomposite coatings. Methods Ni and Ni-SiC nanocomposite coatings were prepared by direct current electrodeposition and pulse electrodeposition respectively. The surface morphology and composition of the coating were studied by SEM and EDS. The deposition rate was calculated by measuring the quality difference of the plating parts before and after plating, and the hardness of the coating was measured by hardness meter. The corrosion resistance of the coating in 3.5%NaCl aqueous solution was studied by polarization curve and electrochemical impedance method. The effects of direct current electrodeposition and pulse electrodeposition on the properties of the coatings were analyzed. Results the surface morphology of Ni-SiC nanocomposite coatings prepared by pulse electrodeposition is more compact, uniform and smooth. The hardness and corrosion resistance of Ni-SiC nanocomposite coating prepared by DC electrodeposition are improved by 616.3 HVV and 9.56 脳 10 ~ (-1) A) A respectively. Conclusion the electrodeposition method has great influence on the properties of the composite coating. The Ni-SiC nanocomposite coating prepared by pulse electrodeposition has better performance.
【作者单位】：辽宁科技大学材料与冶金学院;大连交通大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51374126) 辽宁科技大学青年基金项目(2015QN27);辽宁科技大学大学生创新创业训练计划(2016010) 国家级大学生创新创业训练计划(201610146016)~~
【分类号】：TQ153

【相似文献】