Abstract

Abstract Waterborne epoxy coatings were modified by adding mesoporous-TiO2 nanoparticles (meso-TiO2). In order to achieve proper dispersion of meso-TiO2 in the epoxy-based coating and make possible chemical interactions between meso-TiO2 and polymeric coating, meso-TiO2 was treated with polyethylenimine (PEI) of various molecular weights. Corrosion performance of mild steel coated specimens was investigated employing electrochemical impedance spectroscopy (EIS) and salt spray test. Coatings with meso-TiO2/PEI (600 molecular weight) possessed the best corrosion performance among the coating specimens. The EIS results showed that the resistance value of coating with meso-TiO2/PEI (600 molecular weight) was above 9.87 × 107 Ω cm2 which was higher than neat epoxy coating. Possible chemical interactions between polymeric matrix and treated nanoparticles caused high barrier properties and high degree of cross-linking.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call