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Determination of Electrode Potential in Micro Electrochemical Machining of Passive Metals  

Nam Ho-Sung (서울대학교 대학원 기계항공공학부)
Kim Bo-Hyun (서울대학교 정밀기계설계 공동연구소)
Chu Chong-Nam (서울대학교 기계항공공학부)
Park Byung-Jin (서울대학교 대학원 기계항공공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.23, no.4, 2006 , pp. 146-152 More about this Journal
Abstract
In micro electrochemical machining (ECM), electrodes should be prevented from unfavorable oxide and Passive layer formation on the machined surface or overall corrosion of the entire surface. Generally, metal electrodes corrode, passivate or dissolve in the electrochemical cell according to the electrode potential. Therefore, each electrode must maintain its stable potential. Tn this paper, the stable electrode potentials of tool and workpiece were determined using the potentiodynamic polarization test and verified experimentally considering machining stability and surface quality. Stable workpiece electrode potentials of two different passive materials of 304 stainless steel and nickel were determined in the 0.1 M sulfuric acid. Experimental results show good machined surface and fast machining rate using the determined electrode potentials.
Keywords
Micro electrochemical machining; Electrode potential; Polarization curve; Passivation;
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Times Cited By KSCI : 1  (Citation Analysis)
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