Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지
DOI QR코드

DOI QR Code

Characteristics of Coating Films on Hot-Dipped Aluminized Steel Formed by Plasma Electrolytic Oxidation Process at Different Current Densities

PEO 전류밀도 조건에 따른 알루미늄도금 강재상 산화코팅막의 특성

  • Choi, In-Hye (Division of Marine Engineering, Korea Maritime and ocean University) ;
  • Lee, Hoon-Seung (Division of Marine Engineering, Korea Maritime and ocean University) ;
  • Lee, Myeong-Hoon (Division of Marine Engineering, Korea Maritime and ocean University)
  • 최인혜 (한국해양대학교 기관공학부) ;
  • 이훈성 (한국해양대학교 기관공학부) ;
  • 이명훈 (한국해양대학교 기관공학부)
  • Received : 2017.10.11
  • Accepted : 2017.10.30
  • Published : 2017.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Plasma electrolytic oxidation(PEO) has attracted attention as a surface treatment which has high wear resistance and corrosion resistance. PEO is generally considered as cost-effective, environmentally friendly and superior in terms of coating performance. Most of studies about the PEO processes have been applied to light metals such as Al and Mg. Because the strength of Al and Mg is weaker than that of steel, there is a limit to the application. In this study, PEO process was used to form oxide coatings on Hot dipped aluminized(HDA) steel and the characteristics of the coating film according to the PEO current density were studied. The morphology was observed by SEM and component was analyzed by using EDS. The corrosion behaviors of PEO coating 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 PEO process current density, the pore size of the coating surface and the thickness of coating increased. It was confirmed that no Fe component was present on the coating surface. PEO coating films obviously showed good corrosion resistance compared with HDA. It is considered that the PEO coating acts as a barrier to protect the base material from external factors causing corrosion.

Keywords

References

  1. Hisashi Hayashi, Takeo Nakagawa, Recent trends in sheet metals and their formability in manufacturing automotive panels, Journal of Materials Processing Technology,46 (1994) 455-487. https://doi.org/10.1016/0924-0136(94)90128-7
  2. S.M.A.Shibli, B.Jabeera, R.Manu, Development of high performance aluminum alloy sacrificial anodes reinforced with metal oxides, Materials Letters,61 (2007) 3000-3004. https://doi.org/10.1016/j.matlet.2006.10.062
  3. Gul Hameed Awan, Faiz ul Hasan, The morphology of coating/substrate interface in hot-dip-aluminized steels. Mater. Sci. Eng. (A) 472 (2008) 157-165. https://doi.org/10.1016/j.msea.2007.03.013
  4. V.N.Yeremenko, Ya.V.Natanzon, V.I.Dybkov, The effect of dissolution on the growth of the Fe2Al5 interlayer in the solid iron -liquid aluminum system. J. Mater. Sci. 16(7) (1981) 1748-1756. https://doi.org/10.1007/BF00540620
  5. Toshiaki Yamamoto, Atsuhito Yoshizaki, Tomoyuki Kuroki, Masaaki Okubo, Aluminum Surface Treatment Using Three Different Plasma-Assisted Dry Chemical Processes. IEEE Transactions on Industry Applications, 40(5) (2004) 1220-1225. https://doi.org/10.1109/TIA.2004.834127
  6. J.M.Montero-Moreno M.Sarret, Influence of the aluminum surface on the final results of a two-step anodizing. Surface and Coatings Technology, 201(14) (2007) 6352-6357. https://doi.org/10.1016/j.surfcoat.2006.12.003
  7. Sungmo Moon, Cheolnam Yang, Sangjo Na, Formation behavior of anodic oxide films on Al7075 alloy in sulfuric acid solution. J. Kor. Inst. Surf. Eng, 47(4) (2014) 155-161 https://doi.org/10.5695/JKISE.2014.47.4.155
  8. A.L.Yerokhin, X.Nie, A.Leyland, A.Matthews, S.J.Dowey, Plasma electrolysis for surface engineering. Surface and coatings Technology, 122, (1999) 73-93. https://doi.org/10.1016/S0257-8972(99)00441-7
  9. L.O Snizhko, A.L Yerokhin, A Pilkington, N.L Gurevina, D.O Misnyankin, A Leyland, A Matthews, Anodic processes in plasma electrolytic oxidation of aluminum in alkaline solution. Electrochimica Acta, 49 (2004) 2085-2095. https://doi.org/10.1016/j.electacta.2003.11.027
  10. R.O.Hussein, X.Nie, D.O.Northwood, A.Yerokhin, Matthews, Spectroscopic study of electrolytic plasma and discharging behaviour during the plasma electrolytic oxidation PEO process. Journal of physics D: Applied physics, 43 (2010) 1-13.
  11. A.L.Yerokhin, L.O Snizhko, N.L Gurevina, A.Leyland, A.Pilkington, A.Matthews, Discharge characterization in plasma electrolytic oxidation of aluminum. Journal of Physiscs D: Applied Physics, 36 (2003) 2110-2120. https://doi.org/10.1088/0022-3727/36/17/314
  12. R.O.Hussein., X.Nie., D.O.Northwood, Influence of process parameters on electrolytic plasma discharging behaviour and aluminum oxide coating microstructure. Surface & Coatings Technology, 205 (2010) 1659-1667. https://doi.org/10.1016/j.surfcoat.2010.08.059
  13. Zhenqiang Wu, Yuan Xia, Guang Li, Fangtao Xu, Structure and mechanical properties of ceramic coatings fabricated by plasma electrolytic oxidation on aluminized steel. Applied Surface Science, 253 (2007) 8398-8403. https://doi.org/10.1016/j.apsusc.2007.04.007