Study of changes in physical and chemical characteristics of marine engine oils in the process of optimization
https://doi.org/10.46845/1997-3071-2025-76-91-109
Abstract
During exploitation of marine motor oil, the processes related to the oxidative high-temperature degradation, contamination with soot, wear metals, fuel, water and coolant occur. The quality of used marine motor oil is an indicator for diagnosing the malfunction of marine diesel, so the analysis of the properties of used motor oils is important in determining the reliability of marine diesel engines, as well as ensuring the optimal time of their use. Marine motor oils are dielectrics, which allows considering various electrical characteristics in diagnostic tasks. This paper presents the results of a study of the main physical and chemical characteristics of fresh and used motor oils: relative permittivity, dielectric loss tangent, specific conductivity, water percentage, electrical breakdown voltage, total base number, and viscosity. The authors use a multiparameter approach to analyze the properties of fresh and used motor oils. The temperature dependences of the main physical and chemical characteristics of the following motor oils have been studied: Mobil 5W30, Mobil 5W40, Mobil 10W40, Shell Rimula 15W40, Total DISOLA, Navigo TPEO 12/40. The specified characteristics have been measured depending on the temperature in the range of 20–55 ºC (in 1 ºC increments), both for fresh and used oils. The paper shows the possibility of establishing a correlation between these characteristics, including when they change in used motor oils. The presence of a correlation between these parameters allows this to be used in the tasks of diagnosing marine diesel engines.
Keywords
marine engine oils,
total base number,
relative permittivity,
dielectric loss angle tangent,
electrical breakdown voltage,
viscosity
Supporting agencies: The work was carried out within the framework of the state assignment of the Federal Fisheries Agency, reg. N 122030900056-4.
About the Authors
O. V. Synashenko
Kaliningrad State Technical University
Russian Federation
Russian Federation
Oksana V. Synashenko - PhD in Physics and Mathematics, associate professor of the Department of physics
Kaliningrad
N. Ya. Sinyavskiy
Kaliningrad State Technical University
Russian Federation
Russian Federation
Nikolay Ya. Sinyavskiy - DSc in Physics and Mathematics, professor, head of the Department of physics
Kaliningrad
N. A. Kostrikova
Kaliningrad State Technical University
Russian Federation
Russian Federation
Natal'ya A. Kostrikova - PhD in Physics and Mathematics, associate professor, vice-rector for research
Kaliningrad
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Review
For citations:
Synashenko O.V., Sinyavskiy N.Ya., Kostrikova N.A. Study of changes in physical and chemical characteristics of marine engine oils in the process of optimization. KSTU News. 2025;(76):91-109. (In Russ.) https://doi.org/10.46845/1997-3071-2025-76-91-109
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