본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Corrosion science and technology v.6 no.4, 2007년, pp.147 - 153  

Effects of W Contents in Co Matrix of the Thermal Sprayed WC-Co on the Corrosion Behavior in Molten Zinc

Seong, Byeong-Geun   (New Metals Research Department, RIST  ); Hwang, Sun-Young   (New Metals Research Department, RIST  ); Kim, Kyoo-Young   (Graduate Institute of Ferrous Technology, POSTECH  ); Lee, Kee-Ahn   (School of Advanced Materials Engineering, Andong National Univesity  );
  • 초록

    This study sought to investigate the reaction of Co-binder containing tungsten with molten zinc. Four kinds of Co-W alloys (pure, 10%W, 20%W, 30%W) were prepared using the powder metallurgy method. The specimens were immersion-tested in molten pure zinc baths at $460^{\circ}C$ . To evaluate the corrosion property in molten zinc, the weight loss of the specimen was measured after the immersion tests at different immersion times (10~300 min.). Co-10%W alloys, compared with pure cobalt, showed no effect of tungsten addition on the reaction rate in molten zinc. The relationship between the weight loss and the square root of immersion period represents a straight line in both pure cobalt and Co-10%W alloy. The Co-Zn reaction layer in Co- 1O%W alloy consists of $\gamma2$ , $\gamma1$ , $\gamma$ and ( $\beta1$ phases. The rate of weight loss significantly increases and the weight loss behavior is not well accord with the linear relationship as the tungsten content in the Co-W alloy increases. The $\beta1$ layer was not formed on the Co-20%W alloy and neither was a stable Co-Zn intermetallic compound layer found on the Co-30%W alloy. The main cause of increase in reaction rate with increasing tungsten content is related with the instability of the Co-Zn reaction phases as seen on micro-structural analysis.


  • 주제어

    WC-Co coating .   Co-binder containing tungsten .   thermal spray .   immersion test in molten zinc .   $\beta1$ phase .   $\gamma2$ phase.  

  • 참고문헌 (19)

    1. H. Nakahira, Y. Harada, T. Doi, Y. Takatani, and T. Tomita, J. High Temp. Soc., 16, 317 (1990) 
    2. D. Horstmann, Proc. 6th Inter. Conf. on H.D.G., p.319, London, ZDA (1962) 
    3. K. Tani, T. Tomita, Y. Kobayashi, Y. Takatani, and Y. Harada, ISIJ International, 34, 822 (1994) 
    4. B. G. Seong, S. Y. Hwang, M. C. Kim, and K. Y. Kim, J. Kor. Inst. Met. & Mater., 38, 488 (2000) 
    5. T. B. Massalski, Binary Alloy Phase Diagrams, 2nd edition, Co-Zn, ASM Int. (1990) 
    6. M. R. Rijnders and F. J. J. van Loo, Scripta Metall. et Mater., 32, 1931 (1995) 
    7. A. Hoffman and R. Mohs, Metall, 28, 661 (1974) 
    8. M. Nakagawa, J. Sakai, T. Ohgouchi, and H. Ohkoshi, Tetsu to Hagane, 81, 989 (1995) 
    9. T. Tomita, Y. Takatani, Y. Kobayashi, Y. Harada, and H. Nakahira, ISIJ International, 33, 982 (1993) 
    10. B. G. Seong, S. Y. Hwang, M. C. Kim, and K. Y. Kim, Surface and Coatings Technology, 138, 101 (2001) 
    11. K. Yajima and T. Yamaguchi, Powder Metall. International, 14, 90 (1982) 
    12. D. Horstmann and F. Peters, Proc. 9th Inter. Conf. on H.D.G., p.75, London, ZDA (1971) 
    13. C. Xiaaming, J. Xinchang, and H. Wenxiang, Proc. of environmental & energy efficient heat treatment tech., p.250, Beijing, China, Sept. 15-17 (1993) 
    14. H. Nakahira, Y. Harada, and K. Tani, Proc. ATTAC' 88, p.73, Osaka, Japan (1988) 
    15. B. G. Seong, S. H. Kwon, K. Y. Kim, and K. A. Lee, TMS 2007, p.17, Orlando, Florida, USA, Feb. 25 Mar. 2 (2007) 
    16. M. Sawa, J. Oohori, Processing of International Thermal Spray Conference '95, p.37, Kobe, Japan (1995) 
    17. H. Koga, Y Uchiyama, and T. Aki, J. Jpn. Inst. Met., 42, 136 (1978) 
    18. W. Hadge, R. M. Evans, and A. F. Haskins, Trans. AIME, 203, 824 (1955) 
    19. T. B. Massalski, Binary Alloy Phase Diagrams, 2nd edition, Co-W, ASM Int. (1990) 

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기