物理化学学报 >> 2012, Vol. 28 >> Issue (02): 414414-420..doi: 10.3866/PKU.WHXB201112011

电化学和新能源 上一篇    下一篇

铝表面前处理及化学沉积镍初期行为

杨丽坤, 杨防祖, 田中群, 周绍民   

  1. 厦门大学化学化工学院, 固体表面物理化学国家重点实验室, 福建厦门 361005
  • 收稿日期:2011-10-08 修回日期:2011-11-16 发布日期:2012-01-11
  • 通讯作者: 杨防祖 E-mail:fzyang@xmu.edu.cn
  • 基金资助:

    国家自然科学基金(20873114, 20833005, 21021002), 国家重点基础研究发展规划项目(973) (2009CB930703)和福建省科技计划项目(2009H4020)资助

Initial Behavior of the Electroless Nickel Deposition on Pretreated Aluminum

YANG Li-Kun, YANG Fang-Zu, TIAN Zhong-Qun, ZHOU Shao-Min   

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2011-10-08 Revised:2011-11-16 Published:2012-01-11
  • Contact: YANG Fang-Zu E-mail:fzyang@xmu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20873114, 20833005, 21021002), National Key Basic Research Program of China (973) (2009CB930703), and Science and Technology Project of Fujian Province, China (2009H4020).

摘要: 利用开路电位-时间(EOCP-t)曲线, 研究铝表面经浸镍和化学预镀镍前处理后, 化学沉积镍的初期行为;通过扫描电子显微镜(SEM)观察铝表面经前处理后的表面形貌. 结果表明: 未经及经前处理的铝表面, 化学沉积镍的初期行为都经历去氧化膜、活化、混合控制以及化学沉积过程. 经过浸镍和化学预镀镍前处理后的铝表面附着细小的镍颗粒. 依据EOCP-t 和SEM的最佳实验结果, 在含有络合剂和还原剂的碱性预镀镍溶液中, 经二次化学预镀镍前处理, 成功实现铝基底弱酸性化学镀镍. 所获得的化学镀镍层与铝基底结合牢固, 呈团颗粒状形貌和非晶态结构.

关键词: 化学镀镍, 铝, 浸镍, 化学预镀镍, 开路电位

Abstract: The initial behavior of electroless nickel deposition on aluminum pretreated by nickel immersion and electroless nickel pre-plating processes was studied measuring the open circuit potential (OCP) as a function of time (EOCP-t). Scanning electron microscopy (SEM) was used to observe the surface morphology of the pretreated specimens. During the initial stages of the electroless nickel deposition, all pretreated and un-pretreated aluminum substrates experienced removal of the oxide film, activation, mixed control and electroless nickel deposition. After nickel immersion and electroless nickel pre-plating, fine nickel particles were attached to the surface of the aluminum. Our experimental results, including EOCP-t and SEM, indicate that electroless nickel plating in a weak acidic bath was successfully accomplished on the aluminum pretreated with a double treatment of electroless nickel pre-plating in an alkaline nickel solution containing a complexing agent and a reductant. The nickel coating obtained adhered to the aluminum substrate, had a granular appearance and an amorphous structure.

Key words: Electroless nickel plating, Aluminum, Nickel immersion, Electroless nickel pre-plating, Open circuit potential

MSC2000: 

  • O646