Видання зареєстровані авторами шляхом самоархівування
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Item Ecotoxicity Study of New Composite Materials Based on Epoxy Matrix DER-331 Filled with Biocides Used for Industrial Applications(MDPI, 2022) Panda, A.; Dyadyura, K.; Valíček, J.; Harničárová, M.; Kušnerová, M.; Івахнюк, Тетяна Василівна; Ивахнюк, Татьяна Васильевна; Ivakhniuk, Tetiana Vasylivna; Гребеник, Людмила Іванівна; Гребеник, Людмила Ивановна; Hrebenyk, Liudmyla Ivanivna; Sapronov, O.; Sotsenko, V.; Vorobiov, P.; Levytskyi, V.; Buketov, A.; Pandová, I.The impact of fillers in the epoxy oligomer on the test culture of the marine ecosystem was investigated. The content of additive—biocides—was selected based on the complex research using STAT-GRAPHICS® Centurion XVI. The ecotoxicity of composite surfaces was determined in model systems using methods which are standard in eco-microbiology. The microorganism was identified by studying morphological, cultural, biochemical, and antigenic properties. Studies of the structure and the microrelief of the surfaces of composite materials were conducted using scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy. Based on comprehensive research, it was established that the composition of oxytetracycline with content of q = 1.5 wt% and nanosilver with a content of q = 0.075 wt% per 100 wt% of the DER-331 oligomer and 10 parts by the mass of the TETA hardener ensures the formation of a porous nano-heterogeneous structure of the coating, which leads to the acceleration of the release of silver ions from the surface of the polymer. The rational content of the complex additives of biocides ensures adhesion to the cell wall of bacteria with subsequent penetration into it and subsequent change to the cell membrane, its death, and, therefore, the suppression of the fouling process of metal structures.Item Influence of non-metallic inclusions on the corrosion resistance of stainless steels in arc surfacing(MM Science Journal, Czech Republic, 2021) Pandova, I.; Makarenko, V.; Mitrofanov, P.; Дядюра, Костянтин Олександрович; Дядюра, Константин Александрович; Diadiura, Kostiantyn Oleksandrovych; Гребеник, Людмила Іванівна; Гребеник, Людмила Ивановна; Hrebenyk, Liudmyla IvanivnaThe influence of non-metallic inclusions on the corrosion resistance of stainless steel of the austenitic-martensitic class, deposited in one layer with flux-cored wire under the flux by the arc method in the mode of stationary and pulsed arc burning, has been studied. In the latter case, the wire feed impulse was 0.5 and 0.7 Hz. The selected surfacing conditions, with both methods of the process, contribute to the formation of non-metallic inclusions of complex composition and structure in the deposited metal, including those containing calcium and its compounds with other elements, which are classified as corrosive, accelerating the occurrence of corrosion phenomena.