Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Effect of Mo, Ti, Nb on the hot salt corrosion behavior of ferritic stainless steels for automotive exhaust system

자동차배기관용 페라이트계 스테인레스강의 고온염부식에 미치는 Mo, Ti, Nb 원소의 영향

  • 김수정 (부산대학교, 대학원, 금속공학과) ;
  • 안용식 (부경대학교 재료공학과)
  • Published : 1997.08.01
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Abstract

The steel for automotive exhaust system needs a good corrosion resistance at the atmosphere of high temperature NaCl. Effect of the alloying elements Me, Ti, Nb on the NaCl induced hot corrosion behavior was investigated at the temperatures between 55$0^{\circ}C$ and 75$0^{\circ}C$ for 18Cr ferritic stainless steels. The weight loss by corrosion has increased linearly with corrosion cycle time, and the corrosion rate has accelerated at higher temperature. The alloying of Mo significantly improved corrosion resistance of the steel and the effect was more pronounced at higher temperature. The addition of alloying elements Ti, Nb have also shown improved corrosion resistance by formation of Ti(C,N) or Nb(C, N) precipitates.

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References

  1. NISSHIN Tech. Report v.160 Y. Uchida(et al.)
  2. Werkst. Korros. v.33 G. Herbsleb
  3. Corrosion v.37 C.A.C. Sequeira;M.G. Hocking
  4. Conf. High Temperature Alloys Gas Turbines M.K. Hossain;S.R.J. Saunders
  5. Proc. Conf. on Stainless Steel 1991 Y. Tarutani(et al.)
  6. Proc. Conf. on stainless steel 91 Y. Yazawa(et al.)
  7. Corrosion v.27 no.6 Z. Szklaska;Smialowska
  8. Special Metals and Alloys v.32 T. Fukuzuka(et al.)
  9. Oxid. Metals v.26 Y. Shinata;Y.Nishi
  10. Oxid. Metals v.27 Y. Shinata
  11. Thermochemical properties of inorganic substances v.1;2 I. Barin;O. Knacke;O. Kubaschewski
  12. Thermochemical properties of inorganic substances v.2 I. Barin;O. Knacke;O. Kubaschewski