한국표면공학회지 (Journal of Surface Science and Engineering)

  • 제50권6호
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  • Pages.504-509
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  • 2017
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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주조 스테인리스강의 해양환경 하에서 플라즈마 이온질화 공정온도에 따른 부식특성 연구

Corrosion Characteristics of Cast Stainless Steel under Plasma Ion Nitriding Process Temperature in Marine Environment

  • 투고 : 2017.12.18
  • 심사 : 2017.12.28
  • 발행 : 2017.12.31
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초록

In order to improve corrosion resistance for cast stainless steel in seawater, the characteristics of corrosion resistance after plasma ion nitriding was investigated. Plasma ion nitriding process was conducted in a mixture of nitrogen of 25% and hydrogen of 75% at substrate temperature ranging from 350 to $500^{\circ}C$ for 10 hours using pulsed-DC glow discharge plasma with working pressure of 250 Pa in vacuum condition. Corrosion tests were carried out for as-received and plasma ion nitrided specimens. The corrosion characteristics were investigated by measurement of weight loss and observation of surface morphology. In anodic polarization experiment, relatively less damage depth and weight loss were presented at a nitrided temperature of $400^{\circ}C$, attributing to the formation of S-phase.

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