Journal of the Korean institute of surface engineering (한국표면공학회지)

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

DOI QR Code

Deposition and Characterization of Electrophoretic Paint on AZ31 Magnesium Alloy

  • Nguyen, Van Phuong (Surface Technology Division, Korea Institute of Materials Science) ;
  • Moon, Sungmo (Surface Technology Division, Korea Institute of Materials Science)
  • Received : 2016.02.15
  • Accepted : 2016.03.14
  • Published : 2016.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, electrophoretic paint (E-paint) was deposited on the knife-abraded surface of AZ31 magnesium alloy (AZ31), and its adhesion and corrosion resistance were examined by tape peel-test and salt spray test, respectively. E-paint started to deposit on AZ31 Mg alloy after an inductance time and pores were found in the E-paint layer which is ascribed to hydrogen bubbles generated on the surface during the painting process. The pores disappeared after curing for 15 min at $160^{\circ}C$. The E-paint on AZ31 exhibited good adhesion after immersion in deionized water for 500 h at $40^{\circ}C$. The E-paint sample without scratch showed no corrosion after 1500 h of salt spray test. However, on the scratched sample, blisters were visible adjacent to the scratched sites after 500 h of salt spray test.

Keywords

References

  1. H.E. Friedrich and B.L. Mordike, Magnesium Technology: Metallurgy, Design Data, Applications, Springer, Berlin (2006).
  2. Y. Kojima, Platform Science and Technology for Advanced Magnesium Alloys, Mater. Sci. Forum, 350 (2000) 3-18.
  3. Kainer KU. Magnesium Alloys and their Applications, Wiley-VCH Verlag GmbH (2006).
  4. CRC handbook of Chemistry and Physics. 61st ed. CRC Press Inc. (1980-81).
  5. J.E. Gray, B. Luan, Protective coatings on magnesium and its alloys - a critical review, J. Alloy Compd., 336 (2002) 88-113. https://doi.org/10.1016/S0925-8388(01)01899-0
  6. L. Besra, M. Liu, A review on fundamentals and applications of electrophoretic deposition (EPD), Prog. Mater. Sci., 52 (2007) 1-61. https://doi.org/10.1016/j.pmatsci.2006.07.001
  7. F. Beck, Fundamental aspects of electrodeposition of paint, Prog. Org. Coat., 4 (1976) 1-60. https://doi.org/10.1016/0300-9440(76)80001-X
  8. N.V. Phuong, K.H. Lee, D. Chang, M. Kim, S. Lee, S. Moon, Zinc phosphate conversion coatings on magnesium alloys - a review, Met. Mater. Int., 19 (2013) 273-281. https://doi.org/10.1007/s12540-013-2023-0
  9. R.G. Hu, S. Zhang, J. F. Bu, C.J. Lin, G.L. Song, Recent progress in corrosion protection of magnesium alloys by organic coatings, Prog. Org. Coat., 73 (2012) 129-141. https://doi.org/10.1016/j.porgcoat.2011.10.011
  10. J. Zhang, C. Wu, Corrosion protection behavior of AZ31 magnesium alloy with cathodic electrophoretic coating pretreated by silane, Prog. Org. Coat., 66 (2009) 387-392. https://doi.org/10.1016/j.porgcoat.2009.09.001
  11. S. Moon, C. Yang, S.I. Pyun, A novel method to detect cathodic second-phase particles in Mg alloys, J. Solid State Electrochem., 19 (2015) 3491-3499. https://doi.org/10.1007/s10008-015-2768-0
  12. N.V. Phuong, S. Moon, Deposition and characterization of E-paint on magnesium alloys, Prog. Org. Coat. 89 (2015) 91-99. https://doi.org/10.1016/j.porgcoat.2015.08.014
  13. S. Moon, A blade-abrading method for surface pretreatment of Mg alloys, J. Kor. Inst. Surf. Eng., 48 (2015) 194-198. https://doi.org/10.5695/JKISE.2015.48.5.194
  14. N.M. Acamovic, D.M. Drazic, V.B. Miskovic-Stankovic, Influence of substrate on the formation and growth kinetics of cathodic electrocoat paint, Prog. Org. Coat., 25 (1995) 293-307. https://doi.org/10.1016/0300-9440(94)00511-X
  15. C.M. Reddy, R.S. Gaston, C.M. Weikart, H.K. Yasuda, Influence of surface pretreatment and electrocoating parameters on the adhesion of cathodic electrocoat to the Al alloy surfaces, Prog. Org. Coat., 33 (1998) 225-231. https://doi.org/10.1016/S0300-9440(98)00068-X
  16. ASTM standard D3359-02, ASTM International, 06.01 (2004).
  17. ASTM standard B117-03, ASTM International, 03.02 (2004).

Cited by

  1. Anodic Oxidation Behavior of AZ31 Magnesium Alloy in Aqueous Electrolyte Containing Various Na2CO3Concentrations vol.49, pp.4, 2016, https://doi.org/10.5695/JKISE.2016.49.4.331