OILINESS OF INDIVIDUAL HYDROCARBONS AND ITS INFLUENCE ON THE FORMATION OF SURFACE TRIBOFILMS UNDER FRICTION IN LOCALLY CONTACTING SURFACES

Authors

DOI:

https://doi.org/10.18372/0370-2197.4(109).20752

Keywords:

oiliness (oil action) efficiency, lubricating oil, lubricating film thickness, self-generating organic films (SOP), individual hydrocarbons of paraffinic, naphthenic, and aromatic classes, molecular weight, temperature range, adsorbed lubricating boundary layers

Abstract

The effect of bulk temperature of individual hydrocarbons (paraffinic, naphthenic, and aromatic) on the formation of self-generating organic films (SOP) was studied over the range from each fluid’s melting point to its boiling point. The results reveal a consistent pattern: for each hydrocarbon there exists a characteristic temperature, dependent on molecular weight and lying between its melting and boiling points, at which the intensity of SOP formation increases while the friction torque decreases. Tests with naphthenic hydrocarbons showed that, similar to paraffinic ones, they form SOP on the friction surfaces within a certain temperature interval. With increasing molecular weight, both the temperature of maximum SOP-formation intensity and the final film thickness increase. For aromatic hydrocarbons, the temperature dependence follows the same trend as for paraffinic and naphthenic hydrocarbons but with considerably lower formation intensity and smaller final thickness.

Author Biographies

 Volodymyr Melnyk, State University "Kyiv Aviation Institute"

Candidate of Technical Sciences (Engineering), Associate Professor; Associate Professor, Department of Applied Mechanics and Materials Engineering, State University “Kyiv Aviation Institute”, 1 Liubomyra Huzara Ave., Kyiv, Ukraine. E-mail: nau12@ukr.net. 

Daria Leusenko, National Transport University

PhD, Associate Professor, Department of Production, Repair and Materials Science, National Transport University, 1 Omelianovycha-Pavlenka St., Kyiv, 01010, Ukraine. 

Anatolii Savchuk, National Transport University

Candidate of Technical Sciences (Engineering), Associate Professor; Head of Department, Department of Production, Repair and Materials Science, National Transport University, 1 Omelianovycha-Pavlenka St., Kyiv, 01010, Ukraine 

Dmytro  Hryb, State University "Kyiv Aviation Institute"

PhD Student, Department of Applied Mechanics and Materials Engineering, State University “Kyiv Aviation Institute”, 1 Liubomyra Huzara Ave., Kyiv, Ukraine

Nazarii  Kobzar, State University "Kyiv Aviation Institute"

Master’s Student in the Educational and Professional Program G9 “Applied Mechanics, Standardization and Quality Assessment of Technical Systems”, State University “Kyiv Aviation Institute”, 1 Liubomyra Huzara Ave., Kyiv, Ukraine

References

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Dmytrichenko M.F. Research on the influence of gaseous media on the lubricating ability of mineral oils, their anti-wear and damping action in the engagement of gear teeth. Dissertation for the degree of Ph.D. in Engineering, Kyiv, Kyiv Institute of Civil Aviation Engineers,1979, 173 p.

Kadomsky V.P. Research of lubricating layers and hard-plastic films formed in contact of parts during rolling with sliding. - Dissertation for the degree of Ph.D., Kyiv, Kyiv Institute of Civil Aviation Engineers, 1971, 140 p.

Melnyk V.B., Leusenko D.V., Radko O.V. Analysis of the chemical composition of surface tribofilms formed in local contact of gear gears after running-in in an oil medium with carbonofluorocarbon additives. // Problems of friction and wear, 2025. No. 1(106). P.105-111.

Pavlov V.M. Research on the lubricating effect of oils in gear gears / with the development of methods for measuring the layer thickness / Dissertation for the degree of Ph.D. in Engineering, Kyiv, Kyiv Institute of Civil Aviation Engineers, 1974, 153 p.

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Published

2026-01-22

How to Cite

Melnyk, Volodymyr, Leusenko, D., Savchuk, A.,  Hryb, D., &  Kobzar, N. (2026). OILINESS OF INDIVIDUAL HYDROCARBONS AND ITS INFLUENCE ON THE FORMATION OF SURFACE TRIBOFILMS UNDER FRICTION IN LOCALLY CONTACTING SURFACES. Problems of Friction and Wear, (4(109), 70–81. https://doi.org/10.18372/0370-2197.4(109).20752

Issue

No. 4(109) (2025)

Section

Проблеми тертя та зношування

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