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Frontiers of Materials Science

, Volume 10, Issue 4, pp 367–374 | Cite as

Anti-corrosion mechanism of epoxy-resin and different content Fe2O3 coatings on magnesium alloy

  • Tao Jin
  • Fan-mei Kong
  • Rui-qin Bai
  • Ru-liang Zhang
Research Article

Abstract

In this study, anti-corrosion coatings were prepared and coated successfully on magnesium alloy substrates by mixing nanopowders, solvent, curing agent with epoxy resin. The effect of the amount of iron trioxide (Fe2O3) on the adhesion strength and corrosion resistance on magnesium alloy was investigated with standard protocols, and electrochemical measurements were also made in 3.5 wt.% NaCl solutions. The surface morphology and corrosion mechanism after corrosion tests was characterized using FESEM analysis. Nanoparticles in matrix acted as filler, and interstitial cross-linked spaces and other coating artifacts regions (micro cracks and voids) would all affect the anti-corrosion properties of coating. The results showed the proper powder content not only provided adhesion strength to these coatings but also improved obviously their anticorrosion. Hydrogen bound to the amine nitrogen (1N) could take part in the curing process rather than hydrogen of the amide site due to the smaller ΔG and the more stable configuration.

Keywords

magnesium alloy corrosion iron trioxide anti-corrosion mechanism 

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Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Tao Jin
    • 1
  • Fan-mei Kong
    • 2
  • Rui-qin Bai
    • 1
  • Ru-liang Zhang
    • 1
  1. 1.College of Materials Science and EngineeringShandong University of Science and TechnologyQingdaoChina
  2. 2.College of Earth Science and EngineeringShandong University of Science and TechnologyQingdaoChina

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