Protective Properties of Alkyd Coating with Nanocomposite Pigment on Aluminum Alloy Olha Khlopyk, Sergiy Korniy, Ivan Zin, Bohdan Datsko Proceedings of the 2025 IEEE 15th International Conference Nanomaterials Applications and Properties Nap 2025, 2025 A composite inhibitive pigments based on the natural silicate wollastonite and zinc orthophosphate were obtained by mechanochemical modification. According to the results of electrochemical impedance spectroscopy, the new composite pigment "wollastonite/zinc orthophosphate" incorporated into an alkyd primer demonstrates high protective properties for an aluminum alloy in a 0.1% chloride solution. The high efficiency of the pigment is attributed to the formation of nanostructured phosphate compounds during its mechanochemical modification. These compounds exhibit higher solubility product values compared to standard zinc phosphate pigments, while synergistic interaction with calcium silicate promotes the formation of a highly effective corrosion-resistant film in the area of coating defects.
CORROSION INHIBITION OF ALUMINUM ALLOY BY A SODIUM ALGINATE-BASED COMPOSITION IN A NEUTRAL CHLORIDE-CONTAINING ENVIRONMENT , S.A. Korniy, I.M. Zin, , , O.P. Khlopyk, , R.D. Ostapiv, , N.Y. Sobodosh, and Voprosy Khimii I Khimicheskoi Tekhnologii, 2025 The inhibition of corrosion of an aluminum alloy in a neutral chloride-containing environment was studied using an environmentally friendly composition based on sodium alginate and zinc acetate. The study found that the anti-corrosion efficiency of the composition reached its maximum when the components were present in equal proportions, providing a metal protection degree of 85–95%. Alginate molecules, due to their hydroxyl and carboxyl functional groups, adsorb onto the surface of the aluminum alloy and form poorly soluble complex compounds with Zn2+ cations released during the dissolution of zinc acetate. Consequently, the adsorbed alginate film becomes denser, enhancing its protective properties. Protective layers of zinc hydroxide form on the cathodic regions of the aluminum alloy, effectively slowing down the oxygen reduction reaction. Additionally, acetate ions exhibit anti-corrosion properties through their ability to adsorb onto the metal surface. The formation of a protective film on the alloy surface in inhibited solutions was confirmed by electrochemical impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray analysis.
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