Abstract
The performance of GO and hydroxylated BN in improving the corrosion resistance of a water-borne epoxy coating was comparatively investigated to evaluate the relative excellence of two nanofillers. Electrochemical tests indicated that GO outperformed hydroxylated BN. The corrosion current density was further decreased to 3.48 × 10−6 A/cm2 and polarization resistance was increased to 8.67 × 104 Ω·cm2. The electrochemical reactivity was also most significantly decreased with incorporating GO. Without changing the coating structure, the superior performance of GO was attributed to its exceptional ability to capture water molecules as revealed by simulation results. The mass transfer process of water molecules within coatings was inhibited and the redox reactions during corrosion process were thereby effectively controlled.
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