Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Investigation on surface hardening and corrosion characteristic by water cavitation peening with time for Al 5052-O alloy

5052-O 알루미늄 합금의 워터 캐비테이션 피닝 시간에 따른 표면 경화와 부식 특성에 관한 연구

  • Kim, Seong-Jong (Division of Marine Engineering, Mokpo Maritime University Mokpo City) ;
  • Hyun, Koang-Yong (Division of Marine Engineering, Mokpo Maritime University Mokpo City)
  • 김성종 (목포해양대학교 기관시스템공학부) ;
  • 현광룡 (목포해양대학교 기관시스템공학부)
  • Received : 2012.08.03
  • Accepted : 2012.08.29
  • Published : 2012.08.31
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Abstract

The cavity formed by the ultrasonic generation in the fluid with the application of water cavitation peening collides into the metal surface. At this time, the surface modification effect such as the work hardening presents by the compressive residual stress formed due to the localized plastic deformation. In this investigation, the water cavitation peening technology in the distilled water with the lapse of time was applied to 5052-O aluminum alloy for aluminum ship of a high value. So, the optimum water cavitation peening time on the effect for surface hardening and anti-corrosion property was investigated. Consequently, the water cavitatin peening time on excellent hardness and corrosion resistance characteristic presented 3.5 min. and 5.0 min, respectively. The surface hardness in the optimum water cavitation peening time was improved approximately 45% compared to the non-WCPed condition. In addition, corrosion current density was decreased.

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