Thermodynamic Analysis of Electrodeposited Ni-Mo and Ni-Mo-P Alloys
来源期刊：材料热处理学报2004年第5期
论文作者：XU Rui-dong GUO Zhong-cheng WANG Ji-kun
关键词：electrodeposition; thermodynamic analysis; Ni-Mo; Ni-Mo-P coating;
摘 要：The potential-pH diagram of Ni-P-H2O system is calculated and constructed by use of thermodynamic data. On the basis of the potential-pH diagram the electrochemical behaviors of electrodepositing Ni-Mo and Ni-Mo-P alloys are analyzed. The phases of Ni-Mo and Ni-Mo-P coatings are identified by means of X-ray diffraction analysis. The thermodynamic analysis shows that it is difficult to deposit Mo or P individually from its aqueous solution, and they must be co-deposited with other metals by induced deposition; P and Ni can be deposited as compound Ni3P on the cathode; Mo is deposited in two forms: one is in the form of MoO3 solid particles and the other is in the form of compound MoC. X-ray diffraction analysis is in agreement with the thermodynamic analysis.
XU Rui-dong1，GUO Zhong-cheng1，WANG Ji-kun2
(1.The Centre of New Materials and Surface and Engineering Research & Development, Kunming University of Science and Technology, Kunming, 650093;
2.Yunnan Metallurgy Group Company, Kunming , P.R. China, 650031)
摘要:The potential-pH diagram of Ni-P-H2O system is calculated and constructed by use of thermodynamic data. On the basis of the potential-pH diagram the electrochemical behaviors of electrodepositing Ni-Mo and Ni-Mo-P alloys are analyzed. The phases of Ni-Mo and Ni-Mo-P coatings are identified by means of X-ray diffraction analysis. The thermodynamic analysis shows that it is difficult to deposit Mo or P individually from its aqueous solution, and they must be co-deposited with other metals by induced deposition; P and Ni can be deposited as compound Ni3P on the cathode; Mo is deposited in two forms: one is in the form of MoO3 solid particles and the other is in the form of compound MoC. X-ray diffraction analysis is in agreement with the thermodynamic analysis.
关键词:electrodeposition; thermodynamic analysis; Ni-Mo; Ni-Mo-P coating;
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