Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Investigation on Galvanostatic Method to Protect Cavitation-corrosion Damage for Cu Alloy in Sea Water

해양환경 하에서 동합금의 캐비테이션-부식손상 방지를 위한 방식정전류 기법 연구

  • Park, Jae-Cheul (Division of Marine System Engineering, Mokpo Maritime University) ;
  • Kim, Seong-Jong (Division of Marine System Engineering, Mokpo Maritime University)
  • 박재철 (목포해양대학교 기관시스템공학부) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Received : 2012.02.01
  • Accepted : 2012.02.28
  • Published : 2012.02.29
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Abstract

The galvanostatic tests for corrosion protection are conducted at various applied current densities during 93,600 sec, and evaluated in terms of the variations in current density with time and in the potential at the applied current density. In addition, the corrosion damage depth is analyzed with 3D analysis optical microscope after galvanostatic tests. In this study, it was investigated to decide condition of the corrosion protection gavalnostatic method for Cu-Al alloy that has an excellent corrosion resistance. In the galvanostatic test under the cavitation environment, the energy was reflected or cancelled out by the collision with the oxygen gas generated by the oxygen reduction action. The surface observation showed neither the cavitation damage nor the electrochemical damage in the current density over 0.01 $A/cm^2$ in the dynamic state under the cavitation environment.

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