Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第9卷    第1期    总第30期    1999年3月

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文章编号:1004-0609(1999)01-0159-06
电沉积Ni-Mo和Ni-Mo-P合金的热力学分析
文明芬 杨显万   郭忠诚

(东北大学材料与冶金学院, 沈阳110006

昆明理工大学冶金系, 昆明 650093)

摘 要:   利用热力学数据计算并绘制了Ni-P=H2O系电位-pH图, 根据电位-pH图分析了电沉积Ni-Mo和Ni-Mo-P合金镀层的电化学行为; 利用X射线衍射测试了Ni-Mo和Ni-Mo-P镀层在镀态下的物相组成。 热力学分析表明: Mo和P都难以单金属的形式沉积, 它们必须和其它金属以诱导共沉积的方式才能沉积出来; P, Ni能以金属间化合物Ni3P的形式在阴上沉积; Mo以两种形式进入阴极, 一种为以MoO3固体颗粒复合电镀进入镀层, 另一种为以金属间化合物的形态沉积。 X射线衍射分析表明, P以Ni3P, Mo以MoO3与MoC的形式存在于镀层中, 这一结果与热力学分析结论相一致。

 

关键字: 镀层   热力学   电化学行为   Ni-Mo   Ni-Mo-P

THERMODYNAMIC ANALYSIS OF
ELECTRODEPOSITED Ni-Mo AND Ni-Mo-P ALLOY
Wen Mingfen, Yang Xianwan and Guo Zhongcheng

School of Materials  &  Metallurgy, Northeastern University, Shenyang 110006, P. R. China

Kunming University of Science and Technology, Kunming 650093, P. R. China)

Abstract:The potential-pH diagram of Ni-P-H2O system was drawn by thermodynamical data, the electrochemical actions of electroplating Ni-Mo and Ni-Mo-P alloys were analyzed. The phases of Ni-Mo and Ni-Mo-P coatings were studied by means of XRD. The results showed that it is difficult to deposit Mo and P as single metal but they can be co-deposited by inducing deposition with other metals, P and Ni are deposited in the form of intermetallic  compound; Mo is deposited in the cathode by two forms, one is  the form of MoO3 solid particles and the other is  the form of intermetallic compound. The XRD analysis is in agree with the thermodynamic analysis.

 

Key words:   deposit   thermodynamic   electrochemical action   Ni-Mo, Ni-Mo-P

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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