Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지

Influence of Graphite Epoxy Composite Material on the Electrochemical Galvanic Corrosion of Metals

금속재료의 전기화학적 갈바닉 부식에 미치는 GECM의 영향

  • Yoo, Y.R. (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University) ;
  • Son, Y.I. (Agency For Defense Development) ;
  • Shim, G.T. (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University) ;
  • Kwon, Y.H. (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University) ;
  • Kim, Y.S. (The Center of Green Materials Technology, School of Advanced Materials Engineering, Andong National University)
  • 유영란 (국립안동대학교 신소재공학부 청정소재기술연구센터) ;
  • 손영일 (국방과학연구소) ;
  • 심규태 (국립안동대학교 신소재공학부 청정소재기술연구센터) ;
  • 권용혁 (국립안동대학교 신소재공학부 청정소재기술연구센터) ;
  • 김영식 (국립안동대학교 신소재공학부 청정소재기술연구센터)
  • Published : 2009.02.01
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Abstract

Non metallic composite materials, for example, GECM(graphite epoxy composite material) show high specific strength because of low density. These kinds of non metallic composite materials improved the structural effectiveness and operation economics. However, if these materials contacted several metals, corrosion can be arisen since non metallic composite materials have electrical conductivity. This paper dealt with galvanic corrosion between graphite epoxy composite material and several metals. Base on the electrochemical galvanic corrosion test between GECM and metals, corrosion current of carbon steel and aluminium increased with time but corrosion current of stainless steels and titanium decreased and galvanic potential increased. This behavior shows the galvanic corrosion depends upon the presence of passive film. Also, galvanic effect of GECM coupled with ferrous alloys and non-ferrous alloys was lower than that of 100% graphite, which is attributed to lower exposed area of graphite fiber in the GECM than apparent area of the GECM specimen used for the calculation of galvanic current in this work.

Keywords

References

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