Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Evaluation on cavitation damage in sea water with shot peening stand-off distance for ALBC3 alloy

ALBC3 합금의 쇼트피닝 분사거리에 따른 해수 내 캐비테이션 손상 평가

  • Han, Min-Su (Division of Marine System Engineering, Mokpo Maritime University) ;
  • Jang, Seok-Ki (Division of Marine System Engineering, Mokpo Maritime University) ;
  • Kim, Jong-Sin (Korean Register of Shipping) ;
  • Kim, Seong-Jong (Division of Marine System Engineering, Mokpo Maritime University)
  • 한민수 (목포해양대학교 기관시스템공학부) ;
  • 장석기 (목포해양대학교 기관시스템공학부) ;
  • 김종신 (한국선급) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Received : 2013.09.25
  • Accepted : 2013.10.28
  • Published : 2013.10.31
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Abstract

Marine equipment exposed to harsh environments requires not only excellent corrosion resistance but also improvement of physical characteristics against natural material degradation. With growing interests in ocean energy resources, the higher reliability for marine equipment has become more important in terms of material characteristics. ALBC3 alloy represents excellent corrosion resistance and is widely used in corrosive environments. However, cavitation damage occurs frequently due to its poor durability in high flow rate of marine environment. In this research, shot peening technology was employed as a surface modification with shot peening stand-off distance to mitigate cavitation damage. The effects of shot peening on extent of cavitation damage and weight loss were evaluated for both shot peened and non-peened specimens. The results revealed that the application of shot peeing decreased cavitation damage for all experimental conditions in comparison with the non-peened specimens. The optimum stand-off distance was determined to be 10 cm, since more than 35 % of cavitation damage reduction was observed.

Keywords

References

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