Journal
SURFACE & COATINGS TECHNOLOGY
Volume 201, Issue 16-17, Pages 7241-7245Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2007.01.042
Keywords
nano-sized titanium powder; EIS; breakpoint frequency; corrosion performance
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In this paper, epoxy coatings were modified by adding 5 wt.%, 10 wt.% or 20 wt.% of nano-sized titanium powder respectively. Correspondingly corrosion performance of the modified coatings was studied by electrochemical impedance spectroscopy (EIS) in 3.5% NaCl aqueous solution. The results showed that with high ionic resistance through the coating and low breakpoint frequency, the coating with 10 wt.% nano-sized titanium powder possessed the best corrosion resistance among the coatings tested, which might have resulted from the lowest diffusion coefficient for the inward migration of aggressive media through the coating in the given system. (C) 2007 Elsevier B.V. All rights reserved.
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