Cr-free 코팅액에 의한 아연도금강판의 건조시간에 따른 내식특성
Evaluation of the Corrosion Resistance of Steel Coated with Zinc Using a Cr-free Coating Solution as a Function of Heat Treatment Time
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초록
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 190oC 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 190oC 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.
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 190oC 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 190oC 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.
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)
- 박영준, "Cr-free 처리 용융아연도금강판의 흑변 및 백청현상 연구", 포스코 연구논문, 12(1), pp.106~110 (2007)
- 이석규, "최근 용융아연도금강판의 크로메이트 처리 기술 개발 동향", 한국부식방식학회지, 24, pp.201~212 (1995)
- 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
- 기술표준원, "염수 분무 시험방법", KS D 9502, ~ (2009)
- "Standard Test Methods for MeasuringN 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.23~330 (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)
- Maeda, S, "The Role of Chromate Treatment After Phosphating in Paint Adhesion", Progress in Organic Coatings, 33, pp.83~89 (1998)
- 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)