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Modeling and experimental investigation for electrolytic corrosion prevention in high frequency micro EDM using deionized water

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Abstract

The characteristics of the prevention of electrolytic corrosion during micro electrical discharge machining (EDM) using deionized water and high frequency bipolar pulse were investigated. Electrolytic corrosion during micro EDM using deionized water was analyzed using an equivalent electrical circuit based on the electrical double layer theory. Based on the analysis and experimental verification, a narrow positive pulse duration should be provided to the workpiece to prevent corrosion. A negative voltage with zero average applied voltage (Vavg, app) is also essential for this purpose. If Vavg, app is positive or negative, electrolytic corrosion occurs on the workpiece or tool, respectively. Micro holes and 3D structures without corrosion were successfully fabricated using a high frequency bipolar pulse with a pulse duration of 0.2 μs and a period of 1 μs, as well as Vavg, app = 0 V.

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Acknowledgments

This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the Convergence-ITRC (Convergence Information Technology Research Center) support program (NIPA-2011 C6150-1101-0004) supervised by the NIPA (National IT Industry Promotion Agency) and supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2010-0001201) and supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0000192).

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Authors and Affiliations

  1. School of Robot and Automation Systems, Dongyang Mirae University, 445 Gyeongin-ro, Guro-gu, Seoul, 152-714, Republic of Korea

    Do Kwan Chung

  2. Department of Aeromechanical Engineering, Hanseo University, 360 Daegok-ri, Heami-myun, Chungnam, 356-705, Republic of Korea

    Hong Shik Shin

  3. School of Mechanical and Aerospace Engineering, Seoul National University, Gwanak 1, Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea

    Chong Nam Chu

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  1. Do Kwan Chung
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  2. Hong Shik Shin
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  3. Chong Nam Chu
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Correspondence to Hong Shik Shin.

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Chung, D.K., Shin, H.S. & Chu, C.N. Modeling and experimental investigation for electrolytic corrosion prevention in high frequency micro EDM using deionized water. Microsyst Technol 18, 703–712 (2012). https://doi.org/10.1007/s00542-012-1497-x

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  • DOI: https://doi.org/10.1007/s00542-012-1497-x

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