TY - JOUR
T1 - Evaluating the oxidation properties of lubricants via non-isothermal thermogravimetric analysis
T2 - Estimating induction times and oxidation stability
AU - Smook, Leon A.
AU - Chatra K.R., Sathwik
AU - Lugt, Piet M.
N1 - Funding Information:
We acknowledge SKF for permission to publish this paper. The authors declare that this manuscript “Evaluating the oxidation properties of lubricants via non-isothermal thermogravimetric analysis: Estimating induction times and oxidation stability" is not under consideration for publication elsewhere, that its publication is approved by all authors and tacitly or explicitly by the responsible authorities where the work was carried out, and that, if accepted, it will not be published elsewhere in the same form, in English or in any other language, including electronically without the written consent of the copyright-holder.
Publisher Copyright:
© 2022 The Authors
PY - 2022/7
Y1 - 2022/7
N2 - Applications operating at high temperatures may suffer from oxidative lubricant degradation. The current test methods to evaluate thermoxidative stability and performance are resource intensive and they often provide results that are difficult to extrapolate to application conditions where the temperatures are lower than the test temperature. In this paper, we present a method to evaluate the thermoxidative performance of lubricants via non-isothermal thermogravimetric experiments under conditions closer to application conditions. We can provide effective kinetic parameters for the oxidation process. Based on these parameters, we can simulate mass-loss in experiments at a constant temperature, and estimates of induction times of oils with different antioxidant concentrations agree well with experimental values. Additionally, the kinetic parameters may be used in grease life models.
AB - Applications operating at high temperatures may suffer from oxidative lubricant degradation. The current test methods to evaluate thermoxidative stability and performance are resource intensive and they often provide results that are difficult to extrapolate to application conditions where the temperatures are lower than the test temperature. In this paper, we present a method to evaluate the thermoxidative performance of lubricants via non-isothermal thermogravimetric experiments under conditions closer to application conditions. We can provide effective kinetic parameters for the oxidation process. Based on these parameters, we can simulate mass-loss in experiments at a constant temperature, and estimates of induction times of oils with different antioxidant concentrations agree well with experimental values. Additionally, the kinetic parameters may be used in grease life models.
KW - Grease
KW - Lubrication oils
KW - Oxidative degradation
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85128202595&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2022.107569
DO - 10.1016/j.triboint.2022.107569
M3 - Article
AN - SCOPUS:85128202595
SN - 0301-679X
VL - 171
JO - Tribology international
JF - Tribology international
M1 - 107569
ER -