Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Environmentally Friendly Surface Treatments for Improvement of Corrosion of Steel Sheets: Synergy Effect by Multicoating

강판의 내식성 향상을 위한 환경 친화형 표면처리: 다중코팅에 의한 시너지 효과

  • Jeon Sangik (Division of Chemical Engineering, Pukyong National University) ;
  • Park Chan-Young (Division of Chemical Engineering, Pukyong National University) ;
  • Ryou Jin-Ho (Technical Research Laboratories, POSCO) ;
  • Lee Won-Ki (Division of Chemical Engineering, Pukyong National University)
  • 전상익 (부경대학교 응용화학공학부) ;
  • 박찬영 (부경대학교 응용화학공학부) ;
  • 류진호 (POSCO 기술연구소) ;
  • 이원기 (부경대학교 응용화학공학부)
  • Published : 2005.01.01
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Abstract

Because of the toxicity of hexavelant chromium ion, treatments of metallic surface with chromate compounds to retard corrosion are undesirable for safety control in industrial uses and protection of environment. In this study, we investigated several compounds such as inorganic, organic, and polymer materials in order to sub­stitute the chromate conversion treatment on steel sheet. The corrosion property was investigated in a salt spray tester with 3.5 $wt.{\%}\;NaCI\;at\;35^{\circ}C.$ The results showed that the zirconium/silane/polymer triple coatings on the galvanized steel exhibited a significant retardation of corrosion. Although the multicoating system needs a com­plexed processing, we can confirm a possibility of development of a chromate-free chemical conversion treat­ment for galvanized steel sheet.

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References

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