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Total number
Full text
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0225U004463,
(0125U000773)
,
Development of technology for the protection and restoration of hydropower equipment with the latest composite materials.
Розробка оптимального складу композиту, оцінка його властивостей та розробка технології його використання для захисту та відновлення конструкцій в умовах дії корозійних процесів
Ishchenko Anatolii O., Доктор технічних наук
08-12-2025
State Higher Educational Institution "Azov State Technical University"
Development of new composite materials for the protection and restoration of Ukrainian hydropower plants.
The study deals with nanomodified two-component polyurethane coatings for steel components of hydraulic equipment operating under cavitation wear. The aim is to justify the selection of polymer systems, layer thickness and multilayer architecture in order to extend the service life of runner blades, guide vanes and casings without costly replacement. The experimental programme comprised multiple-impact tests, tensile adhesion tests, rebound (pendulum) measurements, compression tests with stress–strain evaluation, optical damage analysis using a digital microscope, and finite element simulations. Additionally, microstructural analysis of nanomodified polymer blends was carried out using a Prisma E scanning electron microscope at magnifications of 1500× and 35 000×; nanoparticle agglomerates with a characteristic size of about 500 nm and regions of more homogeneous distribution were identified and used to assess dispersion quality and to adjust the processing conditions of the composites. The investigated materials were DK-2, HASP PU-02, PolyFlo PU 2K and PURSIL 2K Silic with TiO₂, ZnO, SiO₂ and Al₂O₃ nanoparticle fillers. Quantitative data on adhesion strength, hardness, energy absorption and stress concentration zones were obtained, demonstrating the advantages of DK-2 and HASP PU-02 systems and the limitations of PolyFlo and PURSIL in severe service conditions. The novelty lies in combining standardized mechanical testing, SEM-based microstructural characterization and parameterised finite element modelling within a dedicated laboratory workflow for specimen preparation. The practical effect is the targeted selection of coating composition and thickness, reducing downtime and repair costs. The results are applicable to hydropower plants, pumping stations, water-supply facilities and related machinery sectors.
Olena V. Nosovska
Anatolii О. Ishchenko
Kapustin Stanislav V
2025-12-08
Updated: 2025-12-11
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