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Corrosion Protection Performance of Polyester-Melamine Coating with Natural Wood Fiber Using EIS Analysis

  • Shin, PyongHwa (Department of Industrial Chemistry, Pukyong National University) ;
  • Jo, DuHwan (Surface Technology Research Group, POSCO) ;
  • Shon, MinYoung (Department of Industrial Chemistry, Pukyong National University)
  • Received : 2016.01.27
  • Accepted : 2016.04.18
  • Published : 2016.04.30

Abstract

In the present study, polyester-melamine coating systems with natural wood fiber (NWF) were prepared and the effects of NWF on the corrosion protectiveness of the polyester-melamine coating were examined using EIS analysis. From the results, higher average surface roughness was observed with increase of NWF content. Water diffusivity and water uptake into the polyester-melamine coatings with NWF were much higher than that into the pure polyester-melamine coating. The decrease in the impedance modulus |Z| was associated with the localized corrosion on carbon steel, confirming that corrosion protection of the polyester-melamine coatings with NWF well agrees with its water transport behavior.

Keywords

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