In Situ AFM Observation of Tribofilms Derived from Antiwear Additives: Formation and Wear Resistance.
Saved in:
| Title: | In Situ AFM Observation of Tribofilms Derived from Antiwear Additives: Formation and Wear Resistance. |
|---|---|
| Authors: | Hayashi, Yumi1 (AUTHOR), Sato, Kaisei2 (AUTHOR), Sasaki, Shinya2 (AUTHOR) s.sasaki@rs.tus.ac.jp |
| Source: | Tribology Transactions. Jul/Aug2025, Vol. 68 Issue 4, p727-738. 12p. |
| Subjects: | Wear resistance, Lubricant additives, Calcium compounds, Interfacial resistance, Lubricating oils, Boundary lubrication, Additives |
| Abstract: | Lubricating oils play a vital role in industrial machinery, particularly in reducing the friction and wear at sliding interfaces. They typically contain a combination of various additives, and the chemical interactions between these additives can lead to synergistic effects or competitive reactions. However, the detailed mechanisms underlying these interactions remain unclear. This study investigates the effects of calcium sulfonate rust inhibitors with different total basic numbers on the wear resistance and tribofilm formation of lubricants containing zinc dialkyldithiophosphate (ZnDTP) and molybdenum dithiocarbamate (MoDTC). Macroscale friction tests using a reciprocating tribotester revealed that calcium sulfonate improved the wear resistance without compromising the low-friction properties of ZnDTP and MoDTC. Nanoscale evaluations conducted via in situ atomic force microscopy and scratch tests demonstrated that calcium sulfonate facilitated the formation of thicker and denser tribofilms, enhancing the wear resistance. Surface analysis using X-ray photoelectron spectroscopy and transmission electron microscopy revealed the presence of calcium compounds throughout the tribofilms formed with calcium sulfonate, which contributed to smoother and more uniform structures. These findings highlight the synergistic effects of calcium sulfonate with ZnDTP and MoDTC and offer insights into the optimization of additive combinations in lubricating oils to improve the performance and lifespan of industrial machinery. [ABSTRACT FROM AUTHOR] |
| Copyright of Tribology Transactions is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | Lubricating oils play a vital role in industrial machinery, particularly in reducing the friction and wear at sliding interfaces. They typically contain a combination of various additives, and the chemical interactions between these additives can lead to synergistic effects or competitive reactions. However, the detailed mechanisms underlying these interactions remain unclear. This study investigates the effects of calcium sulfonate rust inhibitors with different total basic numbers on the wear resistance and tribofilm formation of lubricants containing zinc dialkyldithiophosphate (ZnDTP) and molybdenum dithiocarbamate (MoDTC). Macroscale friction tests using a reciprocating tribotester revealed that calcium sulfonate improved the wear resistance without compromising the low-friction properties of ZnDTP and MoDTC. Nanoscale evaluations conducted via in situ atomic force microscopy and scratch tests demonstrated that calcium sulfonate facilitated the formation of thicker and denser tribofilms, enhancing the wear resistance. Surface analysis using X-ray photoelectron spectroscopy and transmission electron microscopy revealed the presence of calcium compounds throughout the tribofilms formed with calcium sulfonate, which contributed to smoother and more uniform structures. These findings highlight the synergistic effects of calcium sulfonate with ZnDTP and MoDTC and offer insights into the optimization of additive combinations in lubricating oils to improve the performance and lifespan of industrial machinery. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 10402004 |
| DOI: | 10.1080/10402004.2025.2509198 |
