ORIGINAL RESEARCH article
Front. Mech. Eng.
Sec. Tribology
Volume 11 - 2025 | doi: 10.3389/fmech.2025.1591795
This article is part of the Research TopicAdvances in lubrication and damage preventionView all 4 articles
A model describing the oxidation rate of lubricating greases
Provisionally accepted
- 1AC2T Research (Austria), Wiener Neustadt, Austria
- 2SKF Research & Technology Development, Houten, Netherlands
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Grease oxidation in rolling bearings causes a loss of grease in the track and hence a loss of lubricity in the bearing. This work addresses loss of grease via evaporation and oxidation due to thermaloxidative stress applied to two lubricating greases. For this purpose, the oxidation stability of two greases was determined using a modified micro-coking test (MCT) over a wide temperature range from 100 to 190°C. Grease analyses by means of antioxidant content, oxidation and weight loss were used to develop a lifetime model to describe the change in mass as a function of temperature, time, and grease type due to oxidation based on the Arrhenius equation. The developed model describes the correlation between the findings from grease analyses and shows increased oxidation and evaporation after the induction period when antioxidants are almost consumed.
Keywords: Grease degradation, field-to-lab, Oxidation, lifetime model, antioxidant content, Evaporation
Received: 11 Mar 2025; Accepted: 07 May 2025.
Copyright: © 2025 Schneidhofer, Schandl, Dörr and Lugt. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Christoph Schneidhofer, AC2T Research (Austria), Wiener Neustadt, Austria
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