Corrosion Science and Technology

  • 제19권5호
  • /
  • Pages.239-249
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  • 2020
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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선박용 5052-O 알루미늄 합금의 해수 내 진폭 변수에 따른 캐비테이션-침식 손상 특성

Characteristics of Cavitation-Erosion Damage with Amplitude in Seawater of 5052-O Al Alloy for Ship

  • 양예진 (아주대학교 에너지시스템학과 대학원) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Yang, Ye-Jin (Department of Energy Systems Research, Graduate School, Ajou University) ;
  • Kim, Seong-Jong (Division of Marine Engineering, Mokpo National Maritime University)
  • 투고 : 2020.09.14
  • 심사 : 2020.09.30
  • 발행 : 2020.10.30
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초록

The characteristics of cavitation-erosion damage with changes in the amplitude of 5052-O aluminum alloy for ships were investigated in a seawater environment. In the cavitation-erosion experiment, the cavitation environment was created using a vibration-generating device with a piezo-electric effect. The amplitudes of 5 ㎛, 10 ㎛, and 30 ㎛ were created by changing the geometric shape of the cavitation horn. The resistance characteristics of cavitation-erosion damage were evaluated by weight loss and pitting area. The damaged surface was analyzed using scanning electron microscopy (SEM) and 3D optical microscopy. As the amplitude increased, the amount of damage and the area of the damaged surface increased, and the damage was concentrated at the center and edge of the specimen. The pit was created after the initial incubation period with increasing experimental time, and then the pits were merged to grow and propagate into craters, and eventually, the surface was detached and damaged. The cavitation-erosion damage after 30 minutes with amplitude of 10 ㎛ and 30 ㎛ was 1.48 and 2.21 times compared to 5 ㎛, respectively.

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피인용 문헌

  1. Al 6061-T6 합금의 해수 내 캐비테이션 진폭에 따른 캐비테이션-침식 조건하에서 전기화학적 특성 vol.19, pp.6, 2020, https://doi.org/10.14773/cst.2020.19.6.318