DEVELOPMENT OF IDEAS ABOUT ELECTRICAL CORROSION OF RAILWAY TRACK STRUCTURES AND IMPROVEMENT OF THEIR PROTECTION METHODS USING ELECTRICALLY CONDUCTIVE COMPOSITIONS

Research is devoted to the development of ideas about mechanism flow corrosion currents through structures railway tracks and buildings justification methods their protection against electrical corrosion. As a result theoretical studies field tests, electric circuits leakage from pulsating unidirectional potential POEP, which arise during passage rolling stock along electrified direct current tracks, have been clarified. Current carriers are installed in elements track buildings. In concrete, soil, conductors second kind, these mainly cations Ca2+, Na+, anions OH-. It was found that reinforced concrete sleepers, supports passenger platforms due influence zones neutralization leaching cathode anode steel reinforcement formed. Corresponding chemical electrochemical reactions carbonization lime, oxidation iron, etc. occur zones. proposed prevent processes by diverting with grounded screens-coatings made electrically conductive compositions based on mineral binders -Portland cement complex additive or sodium silicate filler - dispersed graphite. The indicator effectiveness screens-coatings, degree reduction strength structure. experimental studies, it established depends share contact area grounding device screen itself, corresponding dependencies were obtained. New protecting substantiated, appropriate structural technological solutions developed.