碳纳米管-镍磷化学复合镀层的组织与性能研究

发布时间：2018-02-17 06:02

本文关键词： 镍磷化学镀碳纳米管复合镀层摩擦磨损性能耐腐蚀性能　出处：《表面技术》2017年05期 　论文类型：期刊论文

【摘要】：目的研究碳纳米管对Ni-P化学镀层组织与性能的影响。方法将碳纳米管(CNTs)加入到镀液中,采用化学镀的方法在45#钢表面制得碳纳米管-镍磷化学复合镀层。利用扫描电镜、X射线衍射仪综合分析复合镀层的表面形貌和结构,并采用多功能材料表面性能测试仪对复合镀层的摩擦磨损性能进行了研究。利用动电位极化技术对Ni-P-CNTs复合镀层在3.5%NaCl溶液中的电化学腐蚀行为进行了研究。结果Ni-P-CNTs化学复合镀层是非晶态结构,CNTs均匀地嵌埋在基质镀层中。在耐磨性试验中,Ni-P-CNTs复合镀层的磨损率比Ni-P镀层降低了7.6×10~(-11) m~3/(N·m),而平均摩擦因数减小了0.074。在电化学腐蚀试验中,Ni-P-CNTs复合镀层的腐蚀电位比Ni-P镀层正移了222 mV,而腐蚀电流密度降低了5.234×10~(-6) A/cm~2。结论碳纳米管填补了镍磷非晶胞间的间隙,改善了复合镀层的组织结构,使Ni-P-CNTs化学复合镀层具有更好的耐摩擦磨损性能和耐腐蚀性能。
[Abstract]:Objective to study the effect of carbon nanotubes (CNTs) on the microstructure and properties of Ni-P electroless coatings. Carbon nanotube-nickel-phosphorus electroless composite coating was prepared on the surface of 4steel by electroless plating. The surface morphology and structure of the composite coating were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The friction and wear properties of the composite coating were studied by multifunctional material surface performance tester. The electrochemical corrosion behavior of Ni-P-CNTs composite coating in 3.5 NaCl solution was studied by potentiodynamic polarization technique. Results the results showed that the electrochemical corrosion behavior of Ni-P-CNTs composite coating in 3.5 NaCl solution was studied. The electroless composite coating is embedded in the matrix coating uniformly by amorphous structure. The wear rate of Ni-P-CNTs composite coating is 7.6 脳 10 ~ (-11) m ~ (3 / 3) N 路m ~ (-1) lower than that of Ni-P coating in wear resistance test. The average friction coefficient is decreased by 0.074 in electrochemical corrosion test. The corrosion potential of Ni-P-CNTs composite coating is 222mV and the corrosion current density is 5.234 脳 10 ~ (-6) A / cm ~ (2) 路cm ~ (-2) compared with Ni-P coating. Conclusion carbon nanotubes can fill the gap between nickel and phosphorus amorphous cells. The microstructure of the composite coating was improved, and the Ni-P-CNTs electroless composite coating had better friction and wear resistance and corrosion resistance.
【作者单位】：装备学院昌平士官学校;装甲兵工程学院;中国人民解放军驻六一八厂军事代表室;
【分类号】：TG174.44

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