摘要
The electrodeposition of black Ni-Co alloy film from Watts nickel solution and the effects of benzotriaozole and imidazole as the additives were studied. The electrolyte consists of NiSO4, NiC12, H3BO3, COSO4 and KNO3. The cathode current efficiency and the throwing power of the solution and the film adhesion to the mild steel metallic foil were determined by standard methods. The crystal structure, lattice parameter, crystal orientation and crystal size were analyzed by X-ray diffraction （XRD）. Moreover, the surface morphology and elemental composition of the black Ni-Co alloy films were analyzed by scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDX） techniques. The darkness of the black films increases with increasing the incorporation of Co ion into the films. The XRD studies reveal that the black Ni-Co alloy films exhibit Ni （11 l） as the preferred orientation.
研究在Watts镍溶液中电沉积制备黑色Ni-Co合金薄膜以及苯并三唑和咪唑作为添加剂对电沉积薄膜的影响。电解液由NiS O4、Ni Cl2、H3BO3、CoS O4和KNO3组成。用标准方法测试溶液的阴极电流效率和均镀能力以及薄膜在低碳钢基底上的粘附性。通过X射线衍射(XRD)研究晶体结构、晶格参数、晶体取向以及晶体尺寸。通过扫描电镜(SEM)和能谱(EDX)分析黑色Ni-Co合金薄膜的表面形貌和元素组成。黑色薄膜的颜色随着薄膜中Co离子掺入量的增加而加深。XRD研究表明黑色Ni-Co合金薄膜以Ni(111)面择优生长。
