Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (10): 892-896.doi: 10.3866/PKU.WHXB19941006

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A Study on the Codeposition Mechanism of Tungsten Carbide Particles with Nickel from Nickel Sulfate Bath

Tan Qi-Xian, Zhu Long-Zhang, Liu Shu-Lan, Guo He-Tong   

  1. Department of Applied Chemistry,Tianjin University,Tianjin 300072
  • Received:1993-06-16 Revised:1993-11-01 Published:1994-10-15
  • Contact: Tan Qi-Xian

Abstract:

 Codeposition process of conductive particles WC with matrix metal Ni from Watts nickel plating bath was studied- The experimental results show that two-step adsorption model proposed by Guglielmi also applies to the codeposition process of conductive particle WC with matrix metal Ni to form Ni -WC composite coating. Strong adsorption step is the rate controlling step. For the Ni-WC codeposition system, it is found that B < A, K=7.0X 103 and the ratio of loose adsorption coverage to strong adsorption coverage of particles at cathode surface is smaller than that of codeposition systems with non-conductive particles.

Key words: Composite plating, Ni-WC composite coating, Conductive particle, Codeposition mechanism, Two-step adsorption model