Abstract: Biofouling and corrosion are well-known problems in the marine industries. In this study, the role of copper oxide (CuO) nanoparticles on the biofouling and corrosion performance of composite (hybrid) zinc coating on steel is examined. A cationic polyelectrolyte polyethylenimine (PEI) is used to stabilize the CuO suspension before particles electrodeposition on a steel substrate. The size and charge density of the PEI coated CuO nanoparticles are followed using light scattering methods and microelectrophoresis. The polymeric modified CuO nanoparticles are electrodeposited on the steel (cathode) surface at pH 9.0 aiming to minimize the effect of aggregation in the suspension and dissolution of the CuO nanoparticles. Standard zinc coating is then electrodeposited on the CuO coated steel sample from a zinc sulfate solution at pH 4.5-5.0. Distribution of CuO nanoparticles at the steel surface and morphology of the composite zinc coating are studied by scanning electron microscopy. The protective properties of this system are investigated in a model corrosive medium of 5% NaCl solution by application of Potentiodynamic polarization (PDP) curves and Polarization resistance (Rp) measurements. The results obtained allow to conclude that the embedded polymeric modified CuO particles ensure better corrosion resistance and protective ability compared to the ordinary zinc.
Cite this article: N. Boshkova, K. Kamburova, Ts. Radeva, N. Boshkov. COMPOSITE ZINC COATINGS WITH POLYMERIC MODIFIED CUO NANOPARTICLES AGAINST CORROSION AND BIOFOULING OF STEEL. Journal of International Scientific Publications: Materials, Methods & Technologies 15, 21-29 (2021). https://www.scientific-publications.net/en/article/1002194/