Results 121 to 130 of about 207 (164)

Thick Film Formation by Zinc Dialkyldithiophosphates

A S L E Transactions, 1983
A series of pure zinc dialkyldithiophosphates have been tested on high-frequency reciprocating test device. The formation of thick chemical films during friction testing was monitored using contact resistance measurements.
P. Cann, H. A. Spikes, A. Cameron
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Genotoxicity studies with a blend of zinc dialkyldithiophosphate lubricant additives

Mutation Research/Genetic Toxicology, 1983
The mutagenic activity of a blend of primary zinc dialkyldithiophosphate lubricant additives suspended in process oils and a blend of the process oils alone was investigated in agar layer cultures of Salmonella typhimurium TA1535, TA1537, TA1538, TA98 and TA100, both with and without the incorporation of a rat liver microsomal activation system (S9 ...
T M, Brooks, A L, Meyer, B J, Dean
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Studies in the stereochemistry of zinc(II). VII. Zinc complexes with dialkyldithiophosphates

Australian Journal of Chemistry, 1970
A series of bis(O,O-dialkyldithiophosphato)zinc(11) complexes, ZnL2 (LH = (R0)2PS2H; R = Et, Pri, Bu, Bui, Bus, cyclohexyl), has been isolated. Pyridine adducts ZnL2(py)2 (R = Et, Pr, Pri, Bui) and ZnL2(py) (R = Pr, Pri, Bui) have also been obtained. Basic complexes ZnO,3ZnL2 (R = Et, Pr) have been isolated.
DR Dakternieks, DP Graddon
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Formation of Zinc Phosphate Polymers and Networks through the Insertion of Metathiophosphates into Zinc Dialkyldithiophosphates

Inorganic Chemistry, 2005
The interactions between metathiophosphates (MTPs) and zinc dialkyldithiophosphates (ZnDDPs) were explored through molecular simulation. The results highlight a novel reaction leading to the formation of zinc phosphate polymers and networks through the insertion of MTPs into ZnDDPs.
Nicholas J, Mosey, Tom K, Woo
openaire   +2 more sources

Preferential Adsorption in the Lubrication Process of Zinc Dialkyldithiophosphate

A S L E Transactions, 1973
Paper chromatography has been used in combination with neutron activation analysis to analyze the polar lubricity additive zinc dihexyldithiophosphate. This additive is shown to contain small but significant quantities of both phosphorous and zinc-containing polar impurities.
D. B. Barton, E. E. Klaus, E. J. Tewksbury, J. R. Strang   +3 more
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Observation of the antiwear activity of zinc dialkyldithiophosphate additives

Wear, 1991
A wear machine in which samples were observed through the countersurface as they were sliding in lubricating engine oils was used to obtain insight into the antiwear action of zinc dialkyldithiophosphates (ZDDPs). Good antiwear activity was associated with the formation of a friction-polymer-like material in the oil at the leading edge of contacts and ...
J.S. Sheasby, T.A. Caughlin, J.J. Habeeb
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Tribochemical effect of impurities in zinc dialkyldithiophosphate in engine oil

Lubrication Science, 2003
AbstractThis study deals with the effects of alcohols and ketones, two substances usually found in commercial zinc dialkyldithio‐phosphate (ZDDP), on the tribological behaviour of ZDDP. Experimental results show that two alcohol and ketone compounds, namely 2‐ethylhexanol and methyl isopropyl ketone, respectively, have an influence on the lubricity ...
Xianguo Hu, Hengzhou Wo, Guopei Han, Yaling Lu   +3 more
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The Preparation and Nature of Surface Films from Zinc Dialkyldithiophosphate

A S L E Transactions, 1980
An Amsler wear-testing machine has been modified to accept mechanisms by which the nominal line-contact between a rotating disk and a stationary flat plane can be traversed slowly along the plane. Lubricant reaction films formed at the contact are thus made available over an area of about 9 × 6 mm2.
R. J. Bird, R. C. Coy, J. F. Hutton
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Microstructural aspects of lubricated mild wear with zinc dialkyldithiophosphate

Wear, 1986
Abstract The microstructure of wear particles formed under boundary lubrication with a zinc dialkyldithiophosphate (ZDDP) is investigated in the analytical scanning transmission electron microscope. This is made possible by the generation of wear particles in foil form. Physical and chemical data are reported and correlated with surface analysis data
J.M. Martin, J.L. Mansot, I. Berbezier, M. Belin, G. Balossier   +4 more
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Mechanism of formation of antiwear films from zinc dialkyldithiophosphates

Tribology International, 1995
Recently developed experimental techniques have allowed better characterization of lubricant-derived antiwear and antifriction surface films. These techniques and the information obtained in earlier studies are being applied to fully formulated engine oils with the objective of assisting implementation of advanced fuel efficient and emissions friendly ...
P.A. Willermet, D.P. Dailey, R.O. Carter, P.J. Schmitz, W. Zhu   +4 more
openaire   +1 more source