Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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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
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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

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