文献类型：期刊文献

中文题名：Fe粉表面化学镀Ni-P的热力学与动力学

英文题名：Thermodynamics and kinetics of electroless Ni-P plating on Fe powder

作者：闫操[1];戴玉林[1];徐宏[1];侯峰[1];姚志燕[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2011

卷号：39

期号：1

起止页码：73

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：教育部博士点专项基金(20060251018)

语种：中文

中文关键词：粉体;化学镀;热力学;动力学

外文关键词：powder; electroless plating; thermodynamics; kinetics

摘要：为了改善粉末的表面性状、提高其耐腐蚀及耐磨损性能、降低烧结温度,文中用化学镀法在Fe粉表面包覆了低熔点的Ni-P合金镀层。为了更好地控制粉体化学镀的沉积速率及探讨其沉积机制,引入电化学Bockris方程式、用称量法测定Fe粉表面镀层的沉积量,根据热力学基本方程式求得了热力学函数ΔG㈠depΘ,ΔSd㈠epΘ,ΔHd㈠epΘ,并研究了各个实验因素对应的动力学参数,建立了沉积速率的经验方程式。实验结果表明:粉体化学镀的最佳施镀温度为362 K,高于此温度时,镀液易分解。在施镀温度范围内,化学反应过程可自发进行,体系为吸热反应。
In order to improve the properties of Fe powder such as inoxidability and abrasion resistance,and drop the sintering temperature,the electroless Ni-P plating on Fe powder was prepared successfully.Bockris equation of the electrochemistry was applied to the thermodynamics of Fe powder electroless Ni-P plating for controlling its deposit rate and deposit mechanism.The thermodynamics functions ΔGdepΘ,ΔSdepΘ and ΔHdepΘ were figured out by studying the deposit amount of coating.In addition,the experiential equation of electroless deposition was established.The results show that the optimal temperature of electroless plating is 362 K.If it is higher than such temperature,the plating liquor may easily decompose.Within the range of optimal temperature,the chemical reaction can occur spontaneously.The reaction of this system is endothermic.