Time-Temperature Studies of High Temperature Deterioration Phenomenon in Lubricant Systems: Synthetic Ester Lubricants.
Abstract
A study of the lengths of the inhibition periods caused by the addition of varying amounts of the bisphenol antioxidant, 4,4'-methylenebis (2,6-di-tertbutylphenol), BPH, on the autoxidation of pentaerythrityl tetraheptanoate, PETH, in a batch reactor at 180, 200 and 220C has been carried out. A kinetic analysis based upon these results together with preliminary results on the BPH decay and quinone methide product formation as a function of time yield a general equation for the rate of decay of BPH. A study of wear rates at 100C manifested by pure PETH and by slightly oxidized PETH has been completed. At one ca. 2% oxidation the wear rate is increased by a factor of 8 over that of pure PETH. This result together with those from various ancillary studies are consistent with the view that hydroperoxides, perhaps in combination with alpha,gamma-substituted difunctional oxidation products, lead to a rapid corrosive wear phenomena. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1978
- Accession Number
- ADA064563
Entities
People
- E. J. Hamilton
- L. R. Mahoney
- P. A. Willermet
- R. K. Jensen
- S. Korcek
Organizations
- Ford Motor Company