In this study, anti-corrosion coatings were prepared and coated success- fully on magnesium alloy substrates by mixing nanopowders, solvent, curing agent with epoxy resin. The effect of the amount of iron trioxide （F...In this study, anti-corrosion coatings were prepared and coated success- fully 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. Nanoparticies 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 AG and the more stable configuration.展开更多
文摘In this study, anti-corrosion coatings were prepared and coated success- fully 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. Nanoparticies 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 AG and the more stable configuration.
