Lubricity of environmentally friendly HFO-1234yf refrigerant Academic Article uri icon


  • Global warming concerns have triggered the interest in alternative refrigerants for air-conditioning and refrigeration compressors. Newly developed refrigerant HFO-1234yf is an attractive and environmentally friendly candidate to replace existing hydrofluorocarbon refrigerants, such as R-134a. Herein, the tribological compatibility of gray cast iron material with this new refrigerant was investigated under aggressive unlubricated conditions. HFO-1234yf exhibits excellent performance compared to R-134a due to the formation of a fluorine-containing protective tribolayer on the topmost surface as X-ray photoelectron spectroscopy (XPS) analysis, inside and outside the wear tracks, revealed. The morphology of the layer was also studied using scanning electron microscopy (SEM) studies. © 2012 Elsevier Ltd.

author list (cited authors)

  • Akram, M. W., Polychronopoulou, K., & Polycarpou, A. A.

citation count

  • 20

publication date

  • January 2013