Effective Protective Coating of Pipe Metal with High-Strength Corrosion-Resistant Material Based on Low-Molecular Oligodiene

Statement of the problem. A significant number of PJSC «Gazprom» main gas pipelines were built thirty or more years ago. At that time ineffective insulating materials were used for protecting steel pipes, applied mainly in the conditions of the route, which led to their extremely unsatisfactory condition in the future. Thus, at present there is a need to develop effective protective coatings for steel pipelines using domestic materials and equipment. Results. As a result of a series of experiments the composition of the composite material of the insulating coating based on the rubber concrete (Kauton) optimized to the state of the rubber mastic of the usable consistency has been determined. By carrying out a series of search experiments, rational temperature-time regimes of rubber mastic heat treatment have been determined for the formation of an effective layer of protective coating on the surface of pipe metal isolating it from harmful influences. Experimental device for providing modes of structure formation of pipe metal insulating coating material has been designed. Vulcanization of the rubber-containing mastic on the surface of a steel tube is performed by induction heating of the tube metal maintaining the necessary temperature-time modes of structure formation of the protective coating material. The physical and mechanical characteristics of the insulating coating for steel pipes on the basis of rubber mastic have been determined experimentally. Conclusions. The results of the research allow us to draw a conclusion about expediency, efficiency and significance of application in various areas of industrial production of coatings based on synthetic rubber to protect steel pipes from various negative influences and aggressive environments.