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Title: Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils

Abstract

Polyalkylene glycols (PAG) have been explored as a possible base stock for engine oil formulation. The friction, wear, and load-carrying capacity of five different PAG chemistries were evaluated either as a base stock or as formulated oils in pure sliding and sliding-rolling conditions using various laboratory bench test rigs operating under boundary and mixed lubrication regimes. The results were compared against GF-5 SAE 5W-20 and a mineral-based oil. The wear surfaces were also characterized using various surface-sensitive techniques for analysis of tribofilms to understand the mechanism of friction reduction. The results indicated that PAG oils show lower friction/traction coefficients and improved load-carrying capability, depending on the formulation, than those of the GF-5 SAE 5W-20 and mineral-based oil. The adsorption of PAG molecules on the surface appeared to be responsible for the lower friction characteristics.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3]
  1. Ford Motor Company, Dearborn, MI, USA
  2. Dow Chemical Company, Midland, MI, USA
  3. Argonne National Laboratory, Argonne, IL, USA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1481205
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Tribology Transactions
Additional Journal Information:
Journal Volume: 61; Journal Issue: 4; Journal ID: ISSN 1040-2004
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English
Subject:
AES; ToF-SIMS; XPS; friction; friction mechanism; mineral oil; polyalkylene glycol; wear

Citation Formats

Gangopadhyay, A., Liu, Z., Simko, S. J., Peczonczyk, S. L., Cuthbert, J. B., Hock, E. D., Erdemir, A., and Ramirez, G. Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils. United States: N. p., 2018. Web. doi:10.1080/10402004.2017.1381286.
Gangopadhyay, A., Liu, Z., Simko, S. J., Peczonczyk, S. L., Cuthbert, J. B., Hock, E. D., Erdemir, A., & Ramirez, G. Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils. United States. doi:10.1080/10402004.2017.1381286.
Gangopadhyay, A., Liu, Z., Simko, S. J., Peczonczyk, S. L., Cuthbert, J. B., Hock, E. D., Erdemir, A., and Ramirez, G. Tue . "Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils". United States. doi:10.1080/10402004.2017.1381286.
@article{osti_1481205,
title = {Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils},
author = {Gangopadhyay, A. and Liu, Z. and Simko, S. J. and Peczonczyk, S. L. and Cuthbert, J. B. and Hock, E. D. and Erdemir, A. and Ramirez, G.},
abstractNote = {Polyalkylene glycols (PAG) have been explored as a possible base stock for engine oil formulation. The friction, wear, and load-carrying capacity of five different PAG chemistries were evaluated either as a base stock or as formulated oils in pure sliding and sliding-rolling conditions using various laboratory bench test rigs operating under boundary and mixed lubrication regimes. The results were compared against GF-5 SAE 5W-20 and a mineral-based oil. The wear surfaces were also characterized using various surface-sensitive techniques for analysis of tribofilms to understand the mechanism of friction reduction. The results indicated that PAG oils show lower friction/traction coefficients and improved load-carrying capability, depending on the formulation, than those of the GF-5 SAE 5W-20 and mineral-based oil. The adsorption of PAG molecules on the surface appeared to be responsible for the lower friction characteristics.},
doi = {10.1080/10402004.2017.1381286},
journal = {Tribology Transactions},
issn = {1040-2004},
number = 4,
volume = 61,
place = {United States},
year = {2018},
month = {1}
}

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