Corrosion behavior and weather-resistance of Nano-Ti polymer functional coating

Abstract

Abstract Anti-corrosion and weather-resistance Nano-Ti polymer functional coating fabricated by spraying + brushing technology. The effects of Nano-Ti polymer contents on structure and properties of the coating were investigated systematically, and the corrosion mechanism of the coating was understood. Results show that the Nano-Ti polymer coating is uniform and dense. With increasing the content of Nano-Ti polymer, the thermal stability of the coating becomes better, and the glass transition temperature increases. When the content of the Nano-Ti polymer is 9%, the glass transition temperature is the highest (206.1 °C). After immersion for 458 days in 3.5wt.% NaCl at room temperature, 125 days neutral salt spray, and 200 days UV aging, the coating is still intact, indicating excellent anti-penetration, anti-corrosion, and weather resistance. EIS results confirm the excellent corrosion protection of the 9% Nano-Ti polymer coating with the biggest corrosion resistance (9.3×108 Ω·cm2).