物理化学学报 >> 1994, Vol. 10 >> Issue (10): 892-896.doi: 10.3866/PKU.WHXB19941006

研究论文 上一篇    下一篇

镍-碳化钨微粒复合电沉积机理的研究

覃奇贤, 朱龙章, 刘淑兰, 郭鹤桐   

  1. 天津大学应用化学系，天津 300072
  • 收稿日期:1993-06-16 修回日期:1993-11-01 发布日期:1994-10-15
  • 通讯作者: 覃奇贤

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

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摘要：

研究了在普通镀镍溶液中导电性微粒碳化鹤与基质金属镍形成复合镀层的电沉积过程．实验结果表明，导电性的WC微粒在与Ni其沉积形成Ni－WC复合镀层的过程中，也遵循Guglielmi的两步吸附机理，只是在电极表面，WC微粒的弱吸附覆盖度与强吸附覆盖度的比值，较非导电性微粒的复合共沉积体系的要小得多．

关键词: 复合镀, Ni-WC复合镀层, 导电性微粒, 共沉积机理, 两步吸附模型

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