Natural refrigerants have gained significant interest due to environmental reasons. Among different natural refrigerants such as water, air, and ammonia, Carbon dioxide (CO2) is the main candidate to replace commonly used hydrofluorocarbon (HFC) refrigerants in air-conditioning compressors due to its environmental benefits. One of the main advantages of implementing CO2, from an environmental point of view, lies in its relative low global warming potential (GWP) which is three orders of magnitude lower than commonly used HFC refrigerants. Coupled with the new refrigerants is also the need to use some form of protective coatings on the tribopairs. In this study unlubricated (presence of CO2 refrigerant only) experiments were performed to evaluate the tribological performance of three different polymeric-based coatings deposited on Durabar G1 gray cast iron disks. Specifically, Fluorolon 325, Impreglon 1704 PEEK, and PEEK/Ceramic/ PTFE blends were tested against 52100 hardened steel pins. Results showed lower friction coefficient and wear in the Fluorolon 325 case compared to the Impreglon 1704 PEEK and PEEK/Ceramic/PTFE coatings. These results are comparable with earlier studies using PTFE-based coatings [1].
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ASME/STLE 2009 International Joint Tribology Conference
October 19–21, 2009
Memphis, Tennessee, USA
Conference Sponsors:
- Tribology Division
ISBN:
978-0-7918-4895-1
PROCEEDINGS PAPER
Tribological Performance of Polymer Coatings in Carbon Dioxide Refrigerant Environment Available to Purchase
Emerson Escobar Nunez,
Emerson Escobar Nunez
University of Illinois at Urbana-Champaign, Urbana, IL
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Andreas A. Polycarpou
Andreas A. Polycarpou
University of Illinois at Urbana-Champaign, Urbana, IL
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Emerson Escobar Nunez
University of Illinois at Urbana-Champaign, Urbana, IL
Andreas A. Polycarpou
University of Illinois at Urbana-Champaign, Urbana, IL
Paper No:
IJTC2009-15190, pp. 119-121; 3 pages
Published Online:
February 16, 2010
Citation
Escobar Nunez, E, & Polycarpou, AA. "Tribological Performance of Polymer Coatings in Carbon Dioxide Refrigerant Environment." Proceedings of the ASME/STLE 2009 International Joint Tribology Conference. ASME/STLE 2009 International Joint Tribology Conference. Memphis, Tennessee, USA. October 19–21, 2009. pp. 119-121. ASME. https://doi.org/10.1115/IJTC2009-15190
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