Abstract
PurposeThis study aims to study the effect of the reinforcement of mixed CeO2-ZrO2 nanoparticles in the polyurethane (PU) for protection properties of steel structures.Design/methodology/approachElectrochemical techniques were used to study the anticorrosion properties of the generated PU/CeO2-ZrO2 nanocomposite coated steel. Dynamic mechanical testing was done to investigate the mechanical properties.FindingsIn natural seawater, Electrochemical impedance spectroscopy experiments indicated outstanding protective behaviour for the PU/CeO2-ZrO2-coated steel. The coating resistance of the PU/CeO2-ZrO2 nanocomposite coating was found to be roughly 30% greater than that of the PU coating. Scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffraction analyses of the coated steel surface revealed that the CeO2-ZrO2 was accumulated at the corrosion products, preventing the corrosion. Dynamic mechanical analysis revealed that when the nanoparticle concentration was 3 Wt.%, the PU/CeO2-ZrO2 nanocomposite coating had improved dynamic mechanical parameters.Originality/valueThe coating resistance of the PU/CeO2-ZrO2 nanocomposite was determined to be 2999.17 kΩ.cm2. The perceived current by scanning electrochemical microscopy analysis across the PU/CeO2-ZrO2 coating was 1.7 nA. The PU/CeO2-ZrO2 nanocomposite had a good hydrophobic behaviour (WCA: 101o). The newly synthesised PU/CeO2-ZrO2 composite offered great barrier and mechanical properties, preventing material degradation and increase the lifespan of the coated steel. Hence, this form of coating could be used as a viable coating material for industrial purposes.
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