Abstract

Recently, electrophoretically deposited graphene oxide coatings are commonly applied as an anti-corrosion layer. However, improper adjustment of electrophoretic deposition (EPD) parameters as well as the hydrophilic nature of graphene oxide contribute to the formation of defects in the coatings and the increase in the wetting properties, respectively, and thus lead to a reduction of protective properties. The growth of wetting performance can be eliminated by a modification of graphene oxide with other chemical compounds. Phosphorus functionalized graphene oxide (P-rGO) coatings as anti-corrosion layers have not been reported yet. As a result of hydrothermal treatment in the presence of orthophosphoric acid, P-rGO samples were obtained. The formation of phosphorus precursors of coatings was confirmed by numerous structural studies. FTIR spectra indicated two peaks, which can be assigned to P-C and P-O bonds. The foreign atoms were introduced into graphene oxide structure in the content of 5%, which was proved based on XPS analysis. The stable and uniform suspension of precursors of coatings allows the production of coatings on the copper substrate by EPD. The uniform and hydrophobic surface of coatings enhanced the anti-corrosion performance compared to nonmodified graphene oxide coatings.

Authors (2)