Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Evaluation of the Corrosion Resistance of Steel Coated with Zinc Using a Cr-free Coating Solution as a Function of Heat Treatment Time

Cr-free 코팅액에 의한 아연도금강판의 건조시간에 따른 내식특성

  • Seo, Hyun-Soo (Defence Agency for Technology and Quality) ;
  • Moon, Hee-Joon (Graduate School, Pukyong National University) ;
  • Kim, Jong-Soon (NGE Tech Ltd) ;
  • Ahn, Seok-Hwan (Bukyong Education Center for Vehicle Safety Component Technology, Pukyong National University) ;
  • Moon, Chang-Kwon (Materials Science and Engineering, Pukyong National University) ;
  • Nam, Ki-Woo (Materials Science and Engineering, Pukyong National University)
  • 서현수 (국방기술품질원) ;
  • 문희준 (부경대학교 대학원) ;
  • 김종순 (엔지텍) ;
  • 안석환 (부경대학교 수송기계안전편의융합부품소재인재양성센터) ;
  • 문창권 (부경대학교 신소재공학부) ;
  • 남기우 (부경대학교 신소재공학부)
  • Received : 2010.07.02
  • Accepted : 2010.09.10
  • Published : 2010.10.31
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Abstract

Chromate conversion coating is a coating technique used to passivate aluminum, zinc, cadmium, copper, silver, magnesium, tin, and their alloys to slow corrosion. The process uses various toxic chromium compounds, which may include hexavalent chromium. The industry is developing less toxic alternatives in order to comply with substance restriction legislation, such as RoHS. One alternative is to develop a Cr-free coating solution. In this study, eco-friendly, Cr-free solutions (urethane solution S-700, organic/inorganic solution with Si LRO-317) were used. Test specimens were dried in a drying oven at $190^{\circ}C$ for 3, 5, 7, and 9 minutes. Corrosion resistance was evaluated using a salt spray test for 72 hours. The results show that the optimum corrosion resistance was achieved at $190^{\circ}C$ for five minutes for EGI and three or five minutes for HDGI, respectively. The adhesive properties of the two types of coating solutions were superior regardless of drying time.

Keywords

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