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Evaluation of Degradation Inhibitors in Poly(Hexafluoropropene Oxide) FluidsThe action of various alloys: 440C steel, M-50 steel, Pyrowear 675, Cronidur 30 and Ti(4Al,4Mn); the effect of decradation inhibitors: mono- and diphospha-s-triazines, diphosphatetraazacyclooctatetraene, phosphate esters, phosphate/ diester rust inhibiting mixtures, and a phosphine were evaluated in two poly(hexafluoropropene oxide) fluids (143AC and 16256). The degradation promoting action of the ferrous alloys in 16256 fluid were comparable; Ti(4Al,4Mn) alloy was significantly more detrimental. The overall rating of the additives was: phosphates (greater than) phosphate/diester mixture (greater than) phosphine (greater than or equal to) phospha-s-triazines. The 16256 fluid was less responsive to additive inhibition than 143AC. Phosphate esters were fully effective over 24 hour exposure in the 16256/440C steel and the 16256/Ti(4Al,4Mn) systems at 330 C. In general, the phosphine was less effective in the presence of ferrous alloys than the phosphates and phospha-s-triazines.
Document ID
19970026121
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jones, William R., Jr. (NASA Lewis Research Center Cleveland, OH United States)
Paciorek, Kazimiera J. L. (Lubricating Specialties Co. Vernon, CA United States)
Lin, Wen-Huey (Lubricating Specialties Co. Vernon, CA United States)
Masuda, Steven R. (Lubricating Specialties Co. Vernon, CA United States)
Nakahara, James H. (Lubricating Specialties Co. Vernon, CA United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1996
Subject Category
Nonmetallic Materials
Report/Patent Number
NAS 1.15:107447
E-10724
NASA-TM-107447
Meeting Information
Meeting: Tribology
Location: London
Country: United Kingdom
Start Date: September 8, 1997
End Date: September 12, 1997
Sponsors: Society of Tribologists and Lubrication Engineers, American Society of Mechanical Engineers
Accession Number
97N25469
Funding Number(s)
PROJECT: RTOP 505-63-5A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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