化学镀镍诱发过程催化活性的电化学本质

INVESTIGATION OF ELECTROCHEMICAL NATURE OF INDUCTION PROCESS OF ELECTROLESS NICKEL PLATING

ＸＰＳ电子能谱技术的测定表明，化学镀诱发伊始，先只有镍的沉积，然后才有ＮｉＰ的共沉积出现。结合铜基试样在所设计的４种溶液体系中动电位扫描伏安曲线的结果，初步显示，对化学镀镍具有催化特性的金属，从电化学本质上来说，就是一种自身能提供到达或超过镍的析出电位的金属。通过电极电位的理论计算及混合电位的测定，说明了化学镀镍首先是镍析出。

The XPS experimental results of the authors' study indicated that the Ni deposits first, then the Ni P co deposits at the beginning of electroless nickel plating process induced on the Cu substrate. Combined with the electrochemical behaviours of Cu substrate in the four intentionally designed solution systems investigated by linear sweep voltammetry, it was tentatively shown that a metal with the catalytical characteristic for electroless nickel plating is the metal whose potential in the electroless plating bath can reach or surpass the potential of Ni deposition. In addition, based on the calculation of electrical potentials and the measurement of mixed potentials, it has also been proved that the deposition of nickel happens first, then the co deposition of Ni P is followed.