Lube-Tech
test. The exceptions are Formulas A and C, which are the singular top-treats of Mo-DTC and B-AMIDE, respectfully. Aged data is similar for singular top treats, but as with the friction benefit, multiple additive combinations yield a statistical improvement in wear.
Figure 7: Disc wear vlumes from SRV experiment. Conclusion
In this experiment, traditional lubricant additives based on boron and molybdenum are incorporated in a low viscosity lubricant for use in applications where copper corrosion and electrical conductivity may be of concern. Results indicate that combinations of B-AMIDE, Mo-AMIDE and Mo-DTC can be effectively used in an EV based fluid without detriment to electrical conductivity or corrosion. Of particular merit is a combination of molybdenum dithiocarbamate and borate ester which provides both a very low impact on electrical conductivity, and a synergistic response to friction in aged oils. In terms of extended oil life, conductivity and friction remained low with this combination.
While formulation differences will always affect performance of any individual additive, it is important not to preemptively rule out traditional additive technology. Older technology may not only work in newer EV formulations without detriment, but may also bring unexpected benefit.
www.vanderbiltchemicals.com
[3] “Hybrid Vehicles are a Bridge to the Future – A Natural Step in the Evolution from Internal Combustion Engines (ICEs) to Full Battery Electric Vehicles (BEVs)”; Chevron Oronite; https://www.
oronite.com/about/news-activities/hybrid-
solutions.html, Accessed 2024-02-10
[4] Alexandra Przyborowski, Raj Shah; “EV Fluid Development Challenges”; Lubes n‘ Greases (Jul 01, 2021)
https://www.lubesngreases.com/ electric-vehicles/article/ev-fluid-development- challenges/; Accessed 2024-02-10
[5] Catherine Fink “Lubricating Composition”; US Patent 335443; Published 1886-02-02
[6] American Borate Company; “Uses of Borates in Lubricants & Greases”;
http://www.americanborate.com/all-about- borates/borate-applications/borates-as- lubricants/#:~:text=It%20is%20believed%20 that%20the,during%20hot%20and%20 cold%20environments; Accessed 2024-02-10
[7] Bernard Shoemaker, Clarence Loane; “Lubricant”; US Patent 2160917; Published 1939-06-06
LUBE MAGAZINE NO.180 APRIL 2024 33
PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE
No.151 page 7
References [1] Carlos E. Garcia, Mao Ueda, Hugh Spikes, Janet S. S. Wong; “Temperature dependence of molybdenum dialkyldithio-carbamate (MoDTC) tribofilms via time-resolved Raman spectroscopy”; Scientific Reports (2021) 11:3621;
https://www.nature.com/articles/ s41598-023-31778-3; DOI 10.1038/s41598- 021-81326-0
[2] Faiz Ullah Shah, Sergei Glavatskih, Oleg N. Antzutkin; “Boron in Tribology: From Borates to Ionic Liquids”; Tribology Letters (2013) 51:281– 301; DOI 10.1007/s11249-013-0181-3
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