PVD법에 의해 제작한 Al-Mg 코팅 강판의 내식성에 미치는 Mg 함량 및 열처리의 영향

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강재욱;박준무;황성화;이승효;문경만;이명훈
Kang, Jae Wook;Park, Jun-Mu;Hwang, Sung-Hwa;Lee, Seung-Hyo;Moon, Kyung-Man;Lee, Myeong-Hoon

  • 투고 : 2016.04.18
  • 심사 : 2016.04.29
  • 발행 : 2016.04.30

초록

This study was intended to investigate the effect of the amount of magnesium addition and heat treatment in the Al-Mg coating film in order to improve corrosion resistance of aluminum coating. Al-Mg alloy films were deposited on cold rolled steel by physical vapor deposition sputtering method. Heat treatment was fulfilled in an nitrogen atmosphere at the temperature of $400^{\circ}C$ for 10 min. The morphology was observed by SEM, component and phase of the deposited films were investigated by using GDLS and XRD, respectively. The corrosion behaviors of Al-Mg films were estimated by exposing salt spray test at 5 wt.% NaCl solution and measuring polarization curves in deaerated 3 wt.% NaCl solution. With the increase of magnesium content, the morphology of the deposited Al-Mg films changed from columnar to featureless structure and particle size was became fine. The x-ray diffraction data for deposited Al-Mg films showed only pure Al peaks. However, Al-Mg alloy peaks such as $Al_3Mg_2$ and $Al_{12}Mg_{17}$ were formed after heat treatment. All the sputtered Al-Mg films obviously showed good corrosion resistance compared with aluminum and zinc films. And corrosion resistance of Al-Mg film was increased after heat treatment.

키워드

Al-Mg coating;Physical vapor deposition;Corrosion resistance;Heat treatment

참고문헌

  1. Y. W. Kim, Technology and market trends of coated steel sheet, Technol. Report, (2005), Pohang: RIST
  2. D. L.Piron, The Electrochemistry of Corrosion, NACE, 304 (1991) 245-256.
  3. P. Fellener, M. C. Paucivova, K. Mataisovsky, Electrolytic aluminium plating in molten salt mixtures based on $AlCl_3$ I: Influence of the addition of tetramethylammonium chloride, Surf. Technol., 14 (1981) 101-108. https://doi.org/10.1016/0376-4583(81)90071-6
  4. C. C. Yang, Electrodeposition of aluminum in molten $AlCl_3$-n-butylpyridinium chloride electrolyte, Mater. Chem. Phys., 37 (1994) 355-361. https://doi.org/10.1016/0254-0584(94)90175-9
  5. M. Hashimoto, Corrosion and anticorrosion of aluminum, Rust management, 9 (2013) 27-33.
  6. S. Yamaguchi, J. Maki, M. Kurosaki, T. Izaki, Tetsu-to-Hagane, Composition and Corrosion Behavior of Hot-dip Al-Si-Mg Alloy Coated Steel Sheets, Tetsu-to-Hagane, 99 (10) (2013) 25-32.
  7. K. R. Baldwin, R. I. Bates, R. D. Arnell, C. J. E. Smith, Aluminium-magnesium alloys as corrosion resistant coatings for steel, Corr. Sci., 38 (1) (1996) 155-156. https://doi.org/10.1016/0010-938X(96)00123-0
  8. J. I. Jeong, etc., Synthesis technology of Al-Mg coatings by physical vapor deposition, Mater. Yard, 24 (6) (2011) 28-360.
  9. L. Liu, R. Xu, G. Song, Corrosion behaviour of Mg-rich Al coatings in the protection of Al alloys, Surf. Coat. Technol., 205 (2) (2013) 332-337.
  10. J. E. Hatch, Aluminum: properties and physical metallurgy, American Society for Metal, Metals Park, (1984) 321-350.
  11. M. He, L. Liu, Y. Wu, C. Zhong, W. Hu, Influence of microstructure on corrosion properties of multilayer Mg-Al intermetallic compound coating, Corr. Sci., 53 (2011) 1312-1321. https://doi.org/10.1016/j.corsci.2010.12.029
  12. F. Sanchette, C. Ducros, A.Billard, C. Rebere, C. Berziou, M. Reffass, J. Creus, Nanostructured aluminium based coatings deposited by electronbeam evaporative PVD, Thin Solid Films, 518(5) (2009) 1575-1580. https://doi.org/10.1016/j.tsf.2009.09.057
  13. Y. S. Sato, S. H. C. Park, M. Michiuchi, H. Kokawa, Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys, Scripta Mater., 50 (2004) 1233-1236. https://doi.org/10.1016/j.scriptamat.2004.02.002
  14. J. L. Murray, Bulletin of Alloy Phase Diagrams, 3(1) (1982) 60-71. https://doi.org/10.1007/BF02873413

과제정보

연구 과제 주관 기관 : 산업통상자원부