Cr-free 코팅액에 의한 아연도금강판의 열처리 온도에 따른 내식특성
Evaluation of the Corrosion Resistance of Zn-Coated Steel as a Function of the Temperature of the Cr-free Solution Used to Coat the Steel
1
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
Zinc has a number of characteristics that make it well suited for use as a coating to protecting iron and steel products from corrosion. Its excellent corrosion resistance in most environments accounts for its successful use as a protective coating on a variety of products and in many exposure conditions. The excellent field performance of zinc coatings results from their ability to form dense, adherent films that corrode at a rate that ranges from 1% to 10% of the corrosion rate of ferrous materials, depending on the environment. Recently, EU RoHS and EU ELV prohibited the use of materials that adversely affect the environment, such as Pb, Hg, Cd, and Cr+6. In this study, environmentally-friendly, Cr-free solutions (epoxy solution, acrylic solution, and urethane solution S-700) and organic/inorganic solution with Si; LRO-317) were used to evaluate the corrosion resistance of zinc-coated steel subjected to a saltwater spray for 72 hours. The coating of urethane solution (S-700) was best among the three kinds of solution with heat treatment during five minutes at 190oF. Test specimens with S-700 and LRO-317 coating were heat treated in a drying oven at 170, 180, 190, 200, and 210oC for five minutes. The results show that the optimum corrosion resistance was 190oC in EGI and 170oC in HDGI, respectively.
Abstract
Zinc has a number of characteristics that make it well suited for use as a coating to protecting iron and steel products from corrosion. Its excellent corrosion resistance in most environments accounts for its successful use as a protective coating on a variety of products and in many exposure conditions. The excellent field performance of zinc coatings results from their ability to form dense, adherent films that corrode at a rate that ranges from 1% to 10% of the corrosion rate of ferrous materials, depending on the environment. Recently, EU RoHS and EU ELV prohibited the use of materials that adversely affect the environment, such as Pb, Hg, Cd, and Cr+6. In this study, environmentally-friendly, Cr-free solutions (epoxy solution, acrylic solution, and urethane solution S-700) and organic/inorganic solution with Si; LRO-317) were used to evaluate the corrosion resistance of zinc-coated steel subjected to a saltwater spray for 72 hours. The coating of urethane solution (S-700) was best among the three kinds of solution with heat treatment during five minutes at 190oF. Test specimens with S-700 and LRO-317 coating were heat treated in a drying oven at 170, 180, 190, 200, and 210oC for five minutes. The results show that the optimum corrosion resistance was 190oC in EGI and 170oC in HDGI, respectively.
참고문헌 (22)
- 김만, "환경친화성 경질 3가 크롬도금의 연구동향", 한국표면공학회지, 37(3), pp.179~184 (2004), 한국표면공학회
- 이철태, "아연도금용 친환경 3가 크로메이트 표면처리기술", 공업화학, 17(5), pp.433~442 (2006), 한국공업화학회
- 김형준, "고내식성 내지문 EGI 강판 개발", 한국표면공학회지, 26(6), pp.307~315 (1993)
- 문경만, "희생양극의 수명에 미치는 인접 강파일의 음극방식 영향", 한국해양공학회지, 22(3), pp.76~81 (2008), 한국해양공학회
- 박영준, "Cr-free 처리 용융아연도금강판의 흑변 및 백청현상 연구", 포스코 연구논문, 12(1), pp.106~110 (2007)
- Cr-free 차세대 나노코팅액 개발에 관한 연구, "이종두", 환경부(나노코), ~ (2006)
- 이철태, "3가 크롬황선염의 크로메이트에 의한 아연도금내식성 증대", 공업화학, 18(3), pp.296~302 (2007), 한국공업화학회
- 조남웅, "크로메이트 처리 대체기술의개발동향", RIST 연구보고서, 15(1), pp.108~113 (2001)
- 기술표준원, "염수 분무 시험방법", KS D 9502, ~ (2009)
- "Standard Test Methods for Measuring Adhesion by Tape Test", ASTM D3359-09, ~
- Bajat, J.B, "The Influence of Zinc Surface Pretreatment on the Adhesion of Epoxy Coating Electrodeposited on Hot-di p Galvanized Steel", Progress in Organic Coating, 58, pp.323~330 (2007)
- Bierwagen, G, "Active Metal-based Corrosion Protective Coating Systems for Aircraft Requiring No-chromate Pretreatment", Progress in Organic Coatings, 67, pp.195~208 (2010)
- Buchheit, R.G, "Active Corrosion Protection and Corrosion Sensing in Chromate-free Organic Coatings", Progress in Organic Coatings, 47, pp.174~182 (2003)
- Deflorian, F, "EIS Study of Organic Coating on Zinc Surface Pretreated with Environmentally Friendly Products", Progress in Organic Coatings, 52, pp.271~279 (2005)
- Japanese Standards Association, "Lead-free, Chromium-free anticorrosive paints", JIS K 5674, ~ (2008)
- Steven, J.H, "Migration and Segregation Phenomena of a Silicone Additive in a Multilayer Organic Coating", Progress in Organic Coatings, 54, pp.104~112 (2005)
- The Japan Iron and Steel Federation, "Handbook for Zn coating steel", ~ (2005)
- Voevodin, N.N, "Investigation of Corrosion Protection Performance of Sol-gel Coatings on AA2024-T3", Progress in Organic Coatings, 52, pp.28~33 (2005)
- Wang, D, "Sol-gel Coatings on Metals for Corrosion", Progress in Organic Coatings, 64, pp.327~338 (2009)
- Yang, H, "High Anticorrosion Chromate-free Passive Films Made by Titanate and Waterborne Polyurethane on Galvanized Steel Sheet", Progress in Organic Coatings, 67, pp.375~380 (2010)
- Zhao, J, "Effects of Chromate and Chromate Conversion Coatings on Corrosion of Aluminum Alloy 2024-T3", Surface and Coatings Technology, 140, pp.51~57 (2001)
- Zheludkevich, M.L, "Sol-gel Coatings for Corrosion Protection of Metals", J. Mater. Chem, 15, pp.5099~5111 (2005)