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Effects of NO X on inhibition of oxidation by ZDTPS
Author(s) -
Johnson M. D.,
Korcek S.,
Rokosz M. J.
Publication year - 1994
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010060304
Subject(s) - nox , antioxidant , lubricant , chemistry , degradation (telecommunications) , combustion , phenol , hexadecane , chemical engineering , organic chemistry , inorganic chemistry , computer science , telecommunications , engineering
Investigations of the effects of nitrogen oxides (NO X ) on liquid phase oxidation and inhibition have been conducted in order to develop an improved understanding of the processes by which NO x accelerates oil degradation in internal combustion engines. Results from studies of the effects of NO x on oxidation of hexadecane (HD) alone, and in combination with a radical trapping (hindered phenol) antioxidant, and preliminary studies with zinc dialkyldithiophosphates (ZDTPs) were presented in previous reports. 1‐3 The complexity of reactions involving NO x and the role in lubricant degradation of NO x from blowby were described. Those results suggested that NO x accelerates the rate of consumption of antioxidant additives and, thus, shortens the useful life of the oil. This work describes results of additional investigations with ZDTPs.