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Electrochemical and thermomechanical behavior of nickel–graphene oxide (2-4L GO) nanocomposite coatings
Applied Physics A ( IF 2.7 ) Pub Date : 2021-02-06 , DOI: 10.1007/s00339-021-04307-0
M. R. Abdul Karim , S. A. Raza , E. U. Haq , K. I. Khan , A. A. Taimoor , M. I. Khan , M. Pavese , P. Fino

In this research work, nanocomposite coatings of nickel reinforced with graphene oxide (GOs) were produced by electrodeposition on steel substrate discs from the modified Watts bath. The resultant coatings were evaluated in terms of their surface morphology by atomic force microscopy and thermomechanical and electrochemical corrosion characteristics. The electrodeposited coatings showed variation in the electrochemical and thermomechanical behavior as the function of GO content where they show the optimum characteristics for 0.1 wt.% GO. The relatively lower concentrations of GO produced composites with greater surface homogeneity and lower roughness, whereas when the GO content is increased, the coatings show increased surface roughness. Electrochemical corrosion resistance of nickel is increased by incorporation of GO up to 0.1 wt.% due to decreased grain boundary area in the coatings and the uniform dispersion of the nanophase ensured by prior probe sonication and magnetic stirring during the co-deposition. The nickel composite coatings with 0.1 wt.% GO also showed improved thermomechanical behavior with higher recovery at 473 K.



中文翻译:

氧化镍-石墨烯(2-4L GO)纳米复合涂层的电化学和热机械行为

在这项研究工作中,通过在改良的瓦特浴中在钢基体圆片上进行电沉积,生产出了用氧化石墨烯(GOs)增强的镍纳米复合涂层。通过原子力显微镜,热机械和电化学腐蚀特性对所得涂层的表面形态进行了评估。电沉积涂层表现出随GO含量变化的电化学和热机械行为,其中它们显示出0.1 wt。%GO的最佳特性。相对较低浓度的GO生产的复合材料具有较高的表面均一性和较低的粗糙度,而当GO含量增加时,涂层的表面粗糙度增加。通过加入高达0.1 wt。%的GO可以提高镍的耐电化学腐蚀性能。由于涂层中的晶界面积减小以及通过在共沉积过程中进行预先的探头超声处理和磁力搅拌确保了纳米相的均匀分散,纳米颗粒的百分含量降低。具有0.1 wt。%GO的镍复合涂层还显示出改善的热机械性能,并在473 K下具有更高的回收率。

更新日期:2021-02-07
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