ИССЛЕДОВАНИЕ РЕАКТИВНЫХ, АДГЕЗИОННЫХ И САМОВОССТАНАВЛИВАЮЩИХСЯ СВОЙСТВ АСФАЛЬТОСМОЛИСТЫХ АНТИКОРРОЗИОННЫХ ПОКРЫТИЙ

Protecting oil and gas pipelines from soil corrosion is a key aspect of ensuring the safety of the entire oil and gas transportation system. Existing insulation coatings provide primary, «passive» protection of pipelines against corrosion, acting as a «diffusion barrier» that prevents corrosive agents (water, soil electrolyte, oxygen in the air) from reaching the metal. For high-quality protection of pipelines against corrosion, the material must have high protective properties and inhibit corrosion processes in aggressive environments.Recent studies have shown that Asmol insulation material and roll insulation materials based on it have optimal properties, including additional chemical adhesion, which increases the effectiveness of the protective coating, as well as properties that ensure the self-healing effect of the coating.The article examines the adhesion of an innovative insulating material — asphalt-resin oligomer asmol — for protecting metal surfaces from corrosion. To understand the interaction of asmol with metal surfaces, the method of asmol synthesis based on the interaction of heavy oil residues with monomers in the presence of sulfuric acid as a catalyst is considered. The dependence of the change in the adhesion value of asmol during its synthesis is obtained. Evidence of the stability of the adhesion of various batches of industrial samples is provided. The stability of adhesion is confirmed by the results of tests under pipeline operating conditions. The chemical adhesion of asphaltene roll materials and coatings based on them is confirmed by laboratory studies on the change in adhesion when samples are exposed for a year. An increase in the number of bonds between sulfo groups and metal over time is expected.The possibility of «healing» defects in the insulating coating has been studied using a unique self-healing coating based on asmol materials. When studying the self-healing effect, the coating is monitored for changes in its thickness and the dynamics of changes in the area of artificial defects in the coating. Based on the data obtained, a value characterizing the self-healing effect was derived.The hypothesis of chemical interaction between asmol and the metal surface was confirmed.