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The Preparation and Nature of Surface Films from Zinc Dialkyldithiophosphate
A S L E Transactions, 1980An 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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Tribochemical effect of impurities in zinc dialkyldithiophosphate in engine oil
Lubrication Science, 2003AbstractThis 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 +3 more
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Variation in zinc dialkyldithiophosphate yield strength measured by nanopillar compression
Tribology International, 2018Abstract In situ transmission electron microscopy based nanopillar compression is utilized to investigate the mechanical properties of zinc dialkyldithiophosphate (ZDDP) tribological films. Small scale testing provides localized insights into the properties of ZDDP films that spatially vary in composition at the nanoscale.
Lin Feng +4 more
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Chemistry and Technology of Fuels and Oils, 1977
These experiments were performed in a laboratory pressure filter with a constant pressure of 5.104 N.m -=. The standard precoat with the filter aid was 1 kg/m 2 of filter surface, and the filter aid was also metered into the slurry being filtered at a rate of 1% of the slurry weight. The filter plate was a twill-weave metal screen (Ff = 20 cm=).
L. I. Rudenko, G. I. Sergeev
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These experiments were performed in a laboratory pressure filter with a constant pressure of 5.104 N.m -=. The standard precoat with the filter aid was 1 kg/m 2 of filter surface, and the filter aid was also metered into the slurry being filtered at a rate of 1% of the slurry weight. The filter plate was a twill-weave metal screen (Ff = 20 cm=).
L. I. Rudenko, G. I. Sergeev
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Zinc Dialkyldithiophosphate-Dispersant Interactions: Effects on Solution Behavior and Wear
SAE Technical Paper Series, 1992<div class="htmlview paragraph">Interactions between a Zinc dialkyldithiophosphate (ZDP) and three different commercially available succinimide dispersants were observed through changes in solutions behavior, as determined by viscometry and Fourier Transform Infrared spectroscopy (FTIR), and four-ball tests.</div> <div class="htmlview ...
M. J. Kulp +3 more
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The antiwear property of zinc dialkyldithiophosphates in used engine oils
Wear, 1983Abstract The change in the lubrication properties of vehicle engine oils with driving distance was studied by using a cross-pin type of lubricant tester and a Fourier transform IR spectrometer. The effect of the thermal decomposition of zinc dialkyldithiophosphates (ZnDTPs) on their antiwear property was also examined.
Kenji Fujita +2 more
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Study of zinc dialkyldithiophosphate using electrochemical techniques
2002Electrochemical techniques have been applied to study the redox behaviour of the antiwear additive zinc diisooctyldithiophosphate (ZDDP) in an ester base fluid and to investigate the influence of applied electrode potential on its friction and wear properties.
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Electroless Generation of Phosphate Films on Metals from Zinc Dialkyldithiophosphates
Chemistry of Materials, 2000An electroless (solution growth) technique based on the thermooxidative decomposition of zinc dialkyldithiophosphates (ZDDPs) in solution, has been developed for the deposition of thin phosphate films on a wide variety of metals including gold and silver.
M. L. Suominen Fuller +3 more
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Study of zinc dialkyldithiophosphate in di-ethylhexyl sebacate using electrochemical techniques
Tribology Letters, 2006Electrochemical techniques have been applied to detect the redox behaviour of the antiwear additive zinc dithiophosphate (ZDDP) in di-ethylhexyl sebacate (DEHS) base fluid solution and to study the interaction of ZDDP with ferrous surfaces. Using cyclic voltammetry it has been shown that the ZDDP is oxidised in a chemically-irreversible process at ...
X. Xu, H. Spikes
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Tribology Letters, 2002
The authors performed ball-on-disk and four-ball tests. The former gave much less severe conditions than the latter. A ZDDP-containing package, blended with a mineral base oil, was tested. Completely different mechanisms of ZDDP conversions were observed. During ball-on-disk tests, ZDDP undergoes partial tribochemical decomposition.
Waldemar Tuszynski +2 more
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The authors performed ball-on-disk and four-ball tests. The former gave much less severe conditions than the latter. A ZDDP-containing package, blended with a mineral base oil, was tested. Completely different mechanisms of ZDDP conversions were observed. During ball-on-disk tests, ZDDP undergoes partial tribochemical decomposition.
Waldemar Tuszynski +2 more
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