Microbial Impact on Epoxy Nanocomposites in Oil and Gas Transportation Systems

This article presents the results of an assessment of the effect of microorganisms on epoxy composites intended for the protection of oil and gas transportation equipment. The relevance of the study stems from the need to ensure the long-term service life of protective coatings in biologically active, aggressive environments. Experimental data on the fungal resistance of the tested materials were obtained during their expo-sure to media containing well-known cultures of destructive microorganisms. The spectrum of metabolic products formed after contact with the specimens with aggressive biological media was analyzed, which made it possible to evaluate the degree of their biodegradation. It was established that the composite based on epoxy resin with the addition of a modifier (d-ascorbic acid) exhibits pronounced fungistatic properties. It was proved that the introduction of a dispersed filler in the form of a synthesized aluminium-copper charge into the composite imparts fungicidal activity to the material as well. It was shown that the presence of discrete fibres further enhances the barrier properties of the composite with respect to microorganism penetration. Thus, the developed epoxy composite is characterized by the ability not only to inhibit fungal growth but also to exert a lethal effect on fungi. These properties render the material resistant to biodeterioration over an extended service life. The results obtained allow the investigated composite to be recommended for the reliable protection of parts and products of oil and gas transportation equipment. The application of such a material holds promise for conditions involving constant contact with biologically active, aggressive environments.