Study on the Characteristics of Corrosion for Epoxy Coated Steel Structure

에폭시도막 강구조물의 부식특성에 관한 연구

  • Lim, U-Jo (Pukyung National University) ;
  • Cheun, Jeong-Hyun (Pukyung National University) ;
  • Jeong, Gi-Cheol (TongMyong College)
  • 임우조 (부경대학교) ;
  • 천정현 (부경대학교) ;
  • 정기철 (동명대학)
  • Published : 1998.06.01

Abstract

Recently, with the rapid development in the industries such as mechanical plants, automobiles, ships and marine structures, it is enlarged by the use of the SS 41 steel. This mechanical plants and marine structures are exposed m corrosion because of Cl-under marine environments. To protect their accidents, mainly applied anti-corrosion epoxy coating and various protective its structures. In this study, corrosion control characteristics on the epoxy coating were investigated by the galvanic corrosion of impressed voltage tester under marine environments The main results obtained are as follows; 1. Corrosion current density of amine-epoxy coating becomes more increased than that of other epoxy coating and the time area rate of pin hole and pit until 5% becomes most rapid. 2. The potential of SUS 304 stainless steel(cathode) for Al-epoxy coating is nearly zero potential. 3. Corrosion current density of Amine-epoxy by shot blast becomes more decreased than that of not shot blast and cathodic potential becomes more noble. 4. As distance of anode and cathode is more decreased, corrosion current density of epoxy coating is more increased and cathodic potential becomes less noble.

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References

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