光亮纳米晶镍的制备及其耐蚀性研究

发布时间：2018-05-05 16:17

本文选题：电镀镍 + 复合添加剂　；参考：《电镀与涂饰》2017年03期

【摘要】：通过向瓦特镀镍液中添加自行研发的复合添加剂(由糖精钠、二乙基丙炔胺、丙烷磺酸吡啶摀盐、乙烯基磺酸钠和羧乙基异硫脲甜菜碱组成),借助直流电沉积法在紫铜表面制得具有不同晶粒尺寸的镍镀层。采用扫描电镜、能谱、X射线衍射、原子力显微镜以及电化学测量技术对镍镀层的表面形貌、元素组成、晶粒尺寸及耐蚀性进行了表征,探讨了晶粒尺寸与光泽度、耐蚀性参数(自腐蚀电流、电荷转移电阻)之间的关系。结果显示,镍镀层表面光亮、均匀、基本无其他杂质元素,晶粒尺寸在纳米级别,镀层光泽度随平均晶粒尺寸的减小而增大,当晶粒尺寸为8 nm时,镀层光泽度达到最大,晶体呈单一的面心立方结构。镀层的耐蚀性随镀层晶粒尺寸的减少而提高,且相比传统添加剂获得的镀层具有更高的耐蚀性。
[Abstract]:By adding self-developed compound additives (sodium saccharin, diethylpropargine, pyridine propane sulfonate) to the nickel bath of Watt, Nickel coatings with different grain sizes were prepared on the surface of copper by direct current electrodeposition with sodium vinyl sulfonate and carboxyethyl isothiourea betaine. The surface morphology, elemental composition, grain size and corrosion resistance of nickel coating were characterized by scanning electron microscope, energy dispersive X-ray diffraction, atomic force microscope and electrochemical measurement. Relationship between corrosion resistance parameters (self-etching current, charge transfer resistance). The results show that the surface of nickel coating is bright, uniform, almost no other impurity elements, the grain size is in the nanometer level, and the gloss of the coating increases with the decrease of average grain size. When the grain size is 8 nm, the gloss of the coating reaches the maximum. The crystal has a single face-centered cubic structure. The corrosion resistance of the coating increases with the decrease of the grain size of the coating, and the corrosion resistance of the coating is higher than that of the traditional additives.
【作者单位】：中南大学化学化工学院;
【分类号】：TQ153.12

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