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个人信息Personal Information
教授 博士生导师
招生学科专业:
机械工程 -- 【招收博士、硕士研究生】 -- 机电学院
机械 -- 【招收博士、硕士研究生】 -- 机电学院
性别:男
毕业院校:南京航空航天大学
学历:南京航空航天大学
学位:工学博士学位
所在单位:机电学院
办公地点:明故宫校区4号楼4309
联系方式:dywang@nuaa.edu.cn
电子邮箱:
Investigation of Pulsating Electrochemical Dissolution of Nickel in Rotating Processes
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所属单位:机电学院
发表刊物:JOURNAL OF THE ELECTROCHEMICAL SOCIETY
关键字:CORROSION BEHAVIOR PASSIVE FILM TRANSPASSIVE DISSOLUTION BREAKDOWN SURFACE
摘要:In counter-rotating electrochemical machining, the current density at a certain point on the workpiece surface presents a pulse characteristic due to the rotation of the workpiece. The waveform and the period of the current for material dissolution are different from that in conventional pulse ECM, resulting in different dissolution performances. In this paper, the pulsating dissolution behaviors of nickel in rotating processes are investigated. Nickel sheets are particularly used to investigate the dissolution processes during one rotation cycle and at different rotational speeds. The machined nickel surfaces are examined by using scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The results indicate that the pulsating dissolution of nickel depends strongly on the rotational speed. Passivation, pitting, high rate dissolution and selective dissolution occur successively during one cycle at low rotational speeds. While, when the rotational speed is over 50 rpm, passivation and pitting alternately happen due to the shortening of the pulse period, which results in rapid decrease in material removal weight. Based on the above research, it can be concluded that the low rotational speeds are more favorable for the effective machining of nickel in CRECM. (c) 2019 The Electrochemical Society.
ISSN号:0013-4651
是否译文:否
发表时间:2019-07-23
合写作者:He, Bin,Li, Jinzheng,朱荻
通讯作者:王登勇