A novel high anti-corrosion performance polymer based composite coating with new functional fillers

Reasonable design, preparation and application of highly effective fillers are the main challenges to significantly improve the protective performance of coatings. Herein, based on the EP coating, polyfluoroaniline@sodium dodecyl benzenesulfonate‑cerium dioxide-montmorillonite (FA@SD-CeO 2 -MMT) filler was elaborately designed. Due to the integral anti-corrosion system, the impedance value of FA@SD-CeO 2 -MMT/EP remained 1.02 × 10 11  Ω cm 2 after 90 d immersion of 3.5% NaCl. And the multi-interactions among MMT, FA@SD and CeO 2 form a trinity anti-corrosion system of passivation, hydrophobic shielding and cathodic protection , which significantly improve the anti-corrosion performance of EP coatings.