RESEARCH OF GROUNDED SCREEN FROM CONDUCTIVE COMPOSITIONSAS A STRUCTURES ELECTRO-CORROSION PROTECT
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2017, Vol 171, Issue 5
Abstract
The use of grounded screens — coatings from compositions with graphite filler based on Portland cement and on the basis of sodium silicate as a means of protecting structures from electrocorrosion by leakage currents was investigated. An original technique, which consists in comparing the magnitude of the current through the armature and concrete of the model of the structure without protection and with protection by a grounded shield-coating was developed. The effectiveness of earthed shields to protect structures, such as passenger platforms, from corrosion by leakage currents has been confirmed experimentally. It is established that protection by an earthed shield provides a reduction in the current in the concrete and armature of the model due to the flow of its most part by a protective shield. The protecting properties of the screen depend on the percentage of the contact area of the steel electrode grounding with it - with increasing this percentage, the current strength in concrete and reinforcement decreases, and through the shielding screen increases. If the screen is used with a percentage of the contact area of the earth electrode with it up to 4,3 %, the current in concrete and armature is reduced by 75 - 80 %.
Authors and Affiliations
Andrii Plugin, Oleksii Plugin, Vladimir Kasyanov, Vitalii Konev, Dmytro Plugin
SIDEBAND EXTRACTION ON THE VIBRATION POWER SPECTRA FOR THE TRACTION GEARBOXES OF ELECTRIC TRAINS
The paper deals with the time-synchronous averaging technique of vibration signals for extraction of the features of the technical state of electric train traction gearboxes. Simulation of the vibration of the faultless...
IMPROVING THE RELIABILITY OF POWER TRANSFORMERS OLTC DEVICES
It is established that one of the effective ways to improve the reliability of the power transformer as a whole is to increase the reliability of its on-load tap-changer (OLTC). As a result of the analysis of statistical...
THE STUDY OF THE DISTRIBUTION OF THE LOADING AND UNLOADING RESOURCES WHEN PERFORMING CARGO OPERATIONS
The analysis carried out in the work showed that a significant part of their turnover time freight cars are under the performance of cargo operations. These operations are the most laborious, complex and have a high cost...
MODELING OF LOGISTIC SYSTEM OF MANAGEMENT OF HIGH-SPEED RAILWAY TRANSPORT
The research of the technology of functioning of the logistic situation model of transport service of the population is conducted, provided that the participation of high-speed rail transport is involved. The basic princ...
A MATHEMATICAL MODELING OF AC ELECTRIC LOCOMOTIVE WITH ACTIVE CONVERTER IN TRACTION
One of the ways to increase the power factor of AC electric locomotives with DC traction motors is the use of converters on fully controlled semiconductor devices — active current source rectifiers. However, the modes of...