열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제23권2호
  • /
  • Pages.90-95
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  • 2010
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
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429EM 강의 내식성에 미치는 결정립 크기의 영향

The Effect of Grain Size on the Corrosion Resistance of 429EM Steel

  • Jung, Byong-Ho (Dept. of Metallurgical Engineering, Pukyong University) ;
  • Ahn, Yong-Sik (Division of Material Science and Engineering, Pukyong University)
  • 투고 : 2010.02.03
  • 심사 : 2010.02.25
  • 발행 : 2010.03.30
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초록

The effects of grain size on the corrosion resistance of 429EM ferritic stainless steels for automobile exhaust system were investigated. Using specimens held at maximum service temperature of $950^{\circ}C$ for 10~70 hours, electrochemical polarization tests were conducted. While corrosion current density, $I_{corr}$, was influenced little by grain size, pitting potential, $E_p$, was increased with an increase of grain size. Sensitizaton at grain boundary occurred when the specimen were held at $950^{\circ}C$ for above 50 hours because of the dissolution of precipitates and grain coarsening.

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참고문헌

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