Abstract
V2O5-incorporated polyfuran (PF) as nanofiller(V2O5-PF) was used to synthesize epoxy (EP)-PF/V2O5 nanocomposites. The PF-functionalized V2O5 nanoparticles were characterized by Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The corrosion protection performance of these coatings on mild steel in natural seawater was determined by electrochemical measurements. Results from electrochemical techniques revealed the superior anticorrosive activity of nanocomposite coatings compared to those of plain epoxy coatings. The superior anticorrosive property of the proposed nanocomposite coatings provides a new horizon in the development of high-performance anticorrosive coatings for various industries. Incorporating PF-functionalized V2O5 nanoparticles into the epoxy coating ensued in the blockage of charge transfer at metal–electrolyte interface which hindered the dissolution of metal/alloy. Scanning electrochemical microscopic (SECM) studies detected lower corrosion current on the EP-PF/V2O5 nanocomposite coated mild steel surface. SEM/EDX analysis examined the corrosion products which acted as the passive layer that reduced the dissolution of steel. The inclusion of PF-functionalized V2O5 nanoparticles to EP improved the mechanical properties of the coated surface which complimented the electrochemical studies.
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