View of the Article PDF: 04_Dmytrenko_Stepovyi
© Viktoriia Dmytrenko, PhD, Head of the Department, ORCID: 0000-0002-1678-2575, e-mail: nning.DmytrenkoVI@nupp.edu.ua; © Yevhen Stepovyi, Postgraduate, ORCID: 0009-0001-4783-3929, e-mail: alenastepovaja@gmail.com (National University «Yuri Kondratyuk Poltava Polytechnic»)
MODELING OF MACROGALVANIC CORROSION OF OIL PIPELINES TAKING INTO ACCOUNT VARIABLE PHYSICAL AND CHEMICAL PROPERTIES OF THE SOIL
DOI: 10.33868/0365-8392-2026-1-286-20-23
Abstract. The article comprehensively examines the problem of ensuring the reliability of main oil pipelines in conditions of a changing soil environment, which significantly affects the intensity of corrosion processes. Particular attention is paid to the influence of soil moisture and ohmic resistance, which determine the electrochemical conditions for the formation of macrogalvanic couples – a key factor accelerating localized corrosion of pipeline metal. The aim of the study is to create a mathematical model capable of accurately describing the distribution of electrochemical potentials and corrosion currents along the pipeline system, taking into account both the properties of the metal and the variable parameters of the external environment. The proposed numerical model is based on solving a system of nonlinear algebraic equations using iterative methods, which allows for detailed simulation of the effect of variable soil moisture on the electrochemical behavior of metal surfaces. The article also provides an analytical description of changes in the parameters of a macrogalvanic couple depending on the level of moisture and electrical resistance of the soil, and proposes a method for calculating the specific polarizability of pipeline metal in different sections of the pipeline. The proposed model allows not only to accurately assess the remaining resource of pipeline systems, but also to identify accident-prone areas in a timely manner, thereby increasing the efficiency of cathodic protection systems. The results obtained are of practical value for the creation of specialized engineering software and can be used in the development of the latest regulatory and technical documents in the field of monitoring and protection of underground pipeline systems.
Keywords: steel oil pipeline, electrochemical corrosion, longitudinal galvanocouple, corrosion model, corrosion rate, environmental safety.
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ISSN 0365-8392
DOI: 10.33868/0365-8392-2026-1-286-20-23
Date of first receipt of the article: 14.01.2026
Date of acceptance for publication: 15.03.2026
Date of publication: 31.03.2026