Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Micro-electrochemical Characteristics of Sensitized 304 Stainless steel Using Micro-droplet cell Techniques

마이크로 드로플릿 셀 기법을 이용한 예민화 된 304 스테인리스강의 미세전기화학 특성

  • Kim, Kyu-Seop (School of Advanced Materials Engineering, Kookmin University) ;
  • Lee, Jae-Bong (School of Advanced Materials Engineering, Kookmin University)
  • 김규섭 (국민대학교 공과대학 신소재 공학부) ;
  • 이재봉 (국민대학교 공과대학 신소재 학부)
  • Received : 2010.12.10
  • Accepted : 2010.12.28
  • Published : 2010.12.01
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Abstract

The influences of sensitization on localized corrosion resistance of 304 stainless steel, were investigated, using micro-dropletcell techniques. Micro-droplet cell allows one to align the micro-electrode to the desired spot of the working electrode and measure directly local current with the potentiodynamic polarization, linear polarization and a.c. impedance. Micro-electrochemical tests were carried out inside of the grain and on grain boundaries separately. It was found that sensitization decreased the pitting potential, increasing corrosion current density around grain boundaries. Galvanic current density was also measured between grain and grain boundaries.

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References

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