ВИВЧЕННЯ НЕГАТИВНОГО ВПЛИВУ НАФТОПРОДУКТІВ НА МЕТАЛЕВІ ЕЛЕМЕНТИ ЗАЛІЗНИЧНОЇ ІНФРАСТРУКТУРИ

Y. V. Zelenko; D. M. Zelenko; L. O. Neduzha

doi:10.15802/stp2020/218353

Authors

Y. V. Zelenko Dnipro National University named after Academician V. Lazaryan, Ukraine https://orcid.org/0000-0001-5551-0305
D. M. Zelenko Dnipro National University named after Academician V. Lazaryan, Ukraine https://orcid.org/0000-0001-7125-5834
L. O. Neduzha Dnipro National University named after Academician V. Lazaryan, Ukraine https://orcid.org/0000-0002-7038-3006

DOI:

https://doi.org/10.15802/stp2020/218353

Keywords:

railway infrastructure, railway, corrosion, petroleum products, mineralization

Abstract

Purpose. The main purpose of the work is to improve the safety of railway transport operation. The implementation of this purpose is provided by assessing and preventing the negative influence of petroleum products on the structural elements of the railway infrastructure. Methodology. The main criterion for assessing the residual life of technical elements of equipment is their strength characteristics. One of the key factors affecting the suitability of technical devices during operation is corrosion damage to the metal. Therefore, the influence of various combinations of the mineralization degree and concentration of petroleum products on the corrosion rate of metals most often used in the design of cooling systems for diesel engines and other transport objects was studied. Thus, for carrying out static and dynamic laboratory tests, model working solutions with different salinity (demineralization model) and different concentrations of dissolved petroleum products (model of standard solutions with organic impurities) were selected. Dynamic and static studies of corrosion damage were carried out by the gravimetric method and the method of polarization resistance using standard samples and solutions. Findings. Based on the results of experimental studies of the authors and analytical data processing, generalizing model dependences of the corrosion rate on the mineralization degree of the working solution of the fractional composition of petroleum products were obtained. A study was carried out and the influence of the water demineralization degree on the corrosion rate of materials of diesel cooling systems was established. Originality. Based on a wide range of author's experimental data, the presence of generalizing dependences of the corrosion rate on temperature, the mineralization degree of the working solution and the fraction of the petroleum products composition has been shown and proven. The obtained dependences form the basis of the developed mathematical model of corrosion, which is a set of relationships linking the characteristics of the corrosion process with various factors influencing its development. Practical value. The obtained experimental and analytical data can be widely used for non-destructive testing procedures, detailed prediction of the state of structural elements and the selection of effective inhibitors to reduce the corrosive aggressiveness of the environment and protect structures.

Author Biographies

Y. V. Zelenko, Dnipro National University named after Academician V. Lazaryan

Dep. «Chemistry and Environmental Engineering», Dnipro National University named after Academician V. Lazaryan, Lazaryana St., Dnipro, Ukraine, 49010, tel. +38 (056) 373 15 77, e-mail j.v.zelenko@gmail.com

D. M. Zelenko, Dnipro National University named after Academician V. Lazaryan

Dep. «Chemistry and Environmental Engineering», Dnipro National University named after Academician V. Lazaryan, Lazaryana St., Dnipro, Ukraine, 49010, tel. +38 (067) 664 17 21, e-mail snay0801@gmail.com

L. O. Neduzha, Dnipro National University named after Academician V. Lazaryan

Dep. «Theoretical and Structural Mechanics», Dnipro National University named after Academician V. Lazaryan, Lazaryana St., Dnipro, Ukraine, 49010, tel. +38 (067) 810 51 65

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