Thermodynamic Analysis of Electrodeposited Ni-Mo and Ni-Mo-P Alloys  

作　　者：GUOZhong-cheng XURui-dong WANGJi-kun 

机构地区：[1]TheCentreofNewMaterialsandSurfaceandEngineeringResearch＆Development,KunmingUniversityofScienceandTechnology,Kunming,650093 [2]YunnanMetallurgyGroupCompany,Kunming,P.R.China,650031

出　　处：《材料热处理学报》2004年第05B期1130-1132,共3页Transactions of Materials and Heat Treatment

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.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：电镀 热力学分析 Ni-Mo合金 NI-MO-P合金 

分 类 号：TQ153.2[化学工程—电化学工业] TG111.3[金属学及工艺—物理冶金]