Corrosion and UV Resistant Coatings Using Fluoroethylene Vinyl Ether Polymer

Document Type : Original Article

Authors

Non-metallic Group, Niroo Research Institute (NRI), P.O. Box: 14665-517, Tehran, Iran

Abstract

Among the different methods of preventing corrosion, coatings are the most common method of protecting against corrosion of metallic structures in aggressive environments. Organic coatings provide a barrier between the corrosive environment and the metallic substrate and are one of the most effective and least costly corrosion protection methods.  In addition to increasing corrosion resistance, the coating should provide good UV resistance. The polymer fluorethylene vinyl ether (FEVE) was coated to increase corrosion resistance in steel structures. The coating was characterized by electrochemical impedance spectroscopy (EIS), dynamic polarization, adhesion, salt spray, field emission scanning electron microscopy (FESEM), and UV weathering. Results showed that barrier effects were improved and coating resistance increased. As the immersion time increased, the carbon-fluorine linear chains at the surface caused the surface hydrophobicity. The hydrophobicity was not reduced by the increasing immersion time, and even with the presence of corrosion products, an increase in corrosion resistance was observed over time. The adhesion of the FEVE coating to the steel surface is more significant than 100 psi. The 360-hour salt fog test confirmed only blistering on the coating surface and showed no signs of rust around the scratch. This coating had excellent scratch resistance in the B-H range. The weather resistance test also demonstrated the excellent resistance of this UV coating without any change of color and gloss. 

Keywords

Main Subjects

References

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Progress in Color, Colorants and Coatings
Volume 16, Issue 1
February 2023
Pages 47-57

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