Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on the Erosion Behavior of the Ceramic Sprayed Coating Layer in the Molten 55% Al-Zn

용융 55%Al-Zn 중에서 세라믹 용사 피막의 침식 거동에 관한 연구

  • 강태영 (연합철강 기술연구소) ;
  • 임병문 (연합철강 기술연구소) ;
  • 최장현 (연합철강 기술연구소) ;
  • 김영식 (한국 해양대학교 기계소재공학과)
  • Published : 2000.06.01
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Abstract

Sink roll has been used in molten 55%Al-Zn alloy bath of continuous galvanizing line for sinking and stabilizing working steel strip in molten metal bath. In the process, the sink roll body inevitably build up dross compounds and pitting on the sink roll surface during 55%Al-Zn alloy coated strip production, and the life time of the sink roll is shorten by build up dross compounds and pitting. The present study examined the application of thermally sprayed ceramic coatings method on sink roll body for improving erosion resistance at molten 55% Al-Zn pool. In this experiment, the stainless steels such as STS 316L and STS 430F were used as the substrate materials. The CoNiCr and WE-Co powder were selected as bond coating materials. Moreover $Al_2O_3-ZrO_2-SiO_2 and ZrO_2-SiO_2$ powders selected as the top coating materials. Appearances of the specimens before and after dipping to molten 55%Al-Zn pool were compared and analyzed. As a result of this study, STS430F of substrate, WC-Co of bond spray coatings, $ZrO_2-SiO_2$ power of top spray coatings is the best quality in erosion resistance test at molten 55%Al-Zn pool

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References

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