Abstract
In this work, hydrophobic polyaniline (PANI)/modified SiO2 composite coatings were prepared by drop-casting modified silica onto electrospun PANI coatings. The PANI/modified SiO2 composite coatings showed excellent corrosion protection properties. The superior protection property of the PANI/modified SiO2 coatings could be ascribed to the synergistic effect of three factors as follows: the electrochemical activity of PANI, the efficient filling of modified SiO2 nanoparticles into the voids of the electrospun PANI coating, and the high hydrophobicity of the hybrid PANI/modified SiO2 coatings. Specifically, the results indicate that PANI/modified SiO2 by the dodecyltrimethoxysilane (PANI/SiO2-DTMS) (CA=95°) coating has a self-repairing function and shows an anticorrosion efficiency of 99.99% for Q235 carbon steel, which was maintained at 99.99% after 71days of immersion in 0.1M H2SO4.
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