Results 161 to 170 of about 957 (204)

Adsorption Studies With Radiolabeled Zinc Dialkyldithiophosphate

Journal of Tribology, 1986
Adsorption of zinc di-n-octyldithiophosphate synthesized with radioactive 65Zn has been studied on iron, steel, silica, and carbon. Adsorption on iron powder in an inert atmosphere is described by Elovich kinetics and Langmuir type isotherms. Adsorption equilibrium was not complete even after ten days.
K. Otto, H. Sorek
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Nanomechanical properties of films derived from zinc dialkyldithiophosphate

Tribology Letters, 1998
We have applied scanning force microscopes to the problem of determining the nanomechanical properties and topography of films derived from the antioxidant/antiwear oil additive zincdialkyldithiophosphate (ZDDP). The enhanced capabilities of the interfacial force microscope (IFM) are exploited to obtain quantitative force-displacement data and pre- and
O.L. Warren, J.F. Graham, P.R. Norton, J.E. Houston, T.A. Michalske   +4 more
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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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Optical parameters of zinc dialkyldithiophosphate in terahertz regime

Optik, 2013
Abstract The optical properties of zinc dialkyldithiophosphate (ZDDP) were investigated using a transmission-mode terahertz time-domain spectroscopy (THz-TDS) measurement. Comparing with the middle-infrared spectra of ZDDP, THz spectra of ZDDP show the weak broad absorption bands, and the absorption coefficients increased monotonously as the ...
Lu Tian, Kun Zhao, Qingli Zhou, Yulei Shi, Cunlin Zhang   +4 more
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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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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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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
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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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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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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