Improved corrosion protection performance of electrophoretic epoxy coatings
Scientists have found that electrophoretic epoxy coatings have improved corrosion protection performance.
A new study shows that electrophoretic epoxy coatings offer improved corrosion protection performance. In the study, polyethylenimine (PEI) was grafted onto the surface of graphene oxide (GO) to produce PEI-GO material. The PEI-GO/EP composite coating was successfully deposited on carbon steel by cathodic electrophoretic deposition (C-EPD). Zeta potential, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), atomic force microscopy (AFM) and thermogravimetric analysis (TGA) were used to characterize the GO and PEI-GO materials.
The dispersibility of PEI-GO in electrophoretic epoxy paint was investigated by TEM, and the fracture surface morphology of the coatings was observed by scanning electron microscopy (SEM). Electrochemical impedance spectroscopy (EIS) was used to investigate the corrosion resistance of the composite coatings. In summary, the impedance modulus of the PEI-GO/EP composite coating is two orders of magnitude higher than that of the pure epoxy coating, resulting in improved corrosion protection performance.
The study was published in the Journal of Coatings Technology and Research in December 2023.
