Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Effect of Cr3+ Chemical Conversion Treatment and Polymer Coating on Corrosion Resistance of Galfan-Coated Carbon Steel

갈판 코팅된 탄소강의 부식 저항성에 미치는 Cr3+ 화성처리 및 폴리머 코팅의 영향

  • Koangyong Hyun (Division of Naval Officer Science, Mokpo National Maritime University) ;
  • Dong-Ho Shin (Graduate school, Mokpo national maritime university) ;
  • Hyun-Kyu Hwang (Graduate school, Mokpo national maritime university) ;
  • Seong-Jong Kim (Division of Marine System Engineering, Mokpo National Maritime University)
  • 현광룡 (국립목포해양대학교 해군사관학부) ;
  • 신동호 (국립목포해양대학교 대학원) ;
  • 황현규 (국립목포해양대학교 대학원) ;
  • 김성종 (국립목포해양대학교 기관시스템공학부)
  • Received : 2024.09.27
  • Accepted : 2024.10.15
  • Published : 2024.10.31
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Abstract

In this study, corrosion properties of galfan-coated carbon steel were compared and analyzed after applying trivalent chromium chemical conversion treatment and polymer coating techniques. Potentiodynamic polarization and galvanostatic corrosion experiments were performed to compare corrosion resistance of galfan-coated carbon steel with different coatings. Results of the potentiodynamic polarization test demonstrated that the specimen treated with both trivalent chromium chemical conversion and polymer coating exhibited superior corrosion resistance to other specimens, showing the lowest corrosion current density of 0.058 µA/cm2. In contrast, the specimen coated only with galfan presented the highest corrosion current density of 0.118 µA/cm2, indicating the lowest corrosion resistance. These results were further validated through additional analyses, including galvanostatic corrosion experiment, 3D microscopy, scanning electron microscopy, and energy-dispersive spectroscopy. Results of this investigation confirmed that trivalent chromium chemical conversion treatment along with polymer coatings could effectively enhance corrosion resistance of carbon steel, offering a promising and environmentally friendly anti-corrosion technology.

Keywords

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