Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Determination of Electrode Potential in Micro Electrochemical Machining of Passive Metals

부동화 금속의 미세 전해 가공 시 전극 전위의 선정

  • 남호성 (서울대학교 대학원 기계항공공학부) ;
  • 김보현 (서울대학교 정밀기계설계 공동연구소) ;
  • 주종남 (서울대학교 기계항공공학부) ;
  • 박병진 (서울대학교 대학원 기계항공공학부)
  • Published : 2006.04.01
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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

References

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