Enhanced Anticorrosion Coatings Prepared from Incorporation of Well-Dispersed Silica Nanoparticles into Fluorinated Polyimide Matrix

摘要

Series of advanced anticorrosive hybrid coatings comprising of organo-soluble fluorinated polyimide (SFPI) matrix dispersed with different feeding ratio of inorganic silica (SiO2) nanoparticles has been successfully prepared through a conventional chemical imidization of polyimide and acid catalyzed sol-gel process of TEOS. It should be noted that the incorporation of SiO2 nanoparticles into the SFPI matrix can effectively enhance the corrosion protection performance on cold-rolled steel (CRS) electrode against corrosive species in saline condition when compared with that of neat polymeric coatings based on a series of standard electrochemical corrosion measurements, such as corrosion potential, polarization resistance, corrosion current, and impedance spectroscopy.