Mechanisms of Antioxidant Decay in Gasoline Engines: Investigations of Zinc Dialkyldithiophosphate Additives Ford Motor Company, Dearborn, Ml

Format:

Conference/Event

Author/Creator:

Korcek, Stefan, author.

Conference Name:

SAE International Congress & Exposition (1981-02-23 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1981

Summary:

Selected engine oils and zinc dialkyldithiophosphate additive concentrates have been added to used oils in various engines and subjected to engine testing. Oil samples obtained as a function of mileage accumulation have been analyzed using the peroxy radical titration method and 31P NMR. The engine studies were supplemented by laboratory investigations of antioxidant behavior of pure neutral and basic zinc dialkyldithiophosphates, dialkyldithiophosphoric acid, tetraalkylthioperoxydiphosphate (disulfide), and of neutral zinc dialkyldithiophosphate in combination with a hindered phenol antioxidant, 4,4-methylenebis(2,6-di-tert-butylphenol). These investigations included studies of the effects of hydroperoxides and hydrocarbon oxidation products on the radical scavenging activity of the above compounds. The results obtained from engine and laboratory studies were used to assess the role and chemical changes of zinc dialkyldithiophosphate additives in radical scavenging processes in the engine

Notes:

Vendor supplied data

Publisher Number:

810014

Access Restriction:

Restricted for use by site license