Results 111 to 120 of about 207 (164)
Developing a sustainable grease from jojoba oil with plant waste based nanoadditives for enhancement of rolling bearing performance. [PDF]
Sci RepDube NN, ElKady M, Noby H, Nassef MGA.
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Tribological Properties of Synthetic and Biosourced Lubricants Enhanced by Graphene and Its Derivatives: A Review. [PDF]
ACS OmegaJafari A +5 more
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Optical parameters of zinc dialkyldithiophosphate in terahertz regime
Optik, 2013Abstract 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 ...
Qingli Zhou, Kun Zhao, Lu Tian
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Friction and Wear Behavior of Zinc Dialkyldithiophosphate Additive
Tribology Transactions, 2000A method has been developed for monitoring the film-forming properties of antiwear additives in rolling-sliding, lubricated contacts. This makes it possible to study both the kinetics of reaction film growth and also the evolution of the film morphology as a function of rubbing time.
Hugh Spikes
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The Chemistry of the Thermal Degradation of Zinc Dialkyldithiophosphate Additives
ASLE Transactions, 1981A mechanism for the thermal decomposition of zinc dialkyldithiophosphate additives has been proposed that accounts for the major degradation products and their dependence on the nature of the alkyl group. The proposed mechanism generally follows well-known rules of phosphorus chemistry. The major points are as follows.
R. B. Jones, R. C. Coy
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ACS Applied Materials & Interfaces, 2020
Zinc dialkyldithiophosphate (ZDDP) is added to engine lubricants to reduce wear and ensure reliable operation. ZDDP reacts under rubbing conditions to form protective zinc/iron phosphate tribofilms on steel surfaces. Recently, it has been demonstrated that this process can be promoted by applied stresses in lubricated contacts, as well as temperature ...
James P. Ewen, Hugh Spikes, Mao Ueda
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Zinc dialkyldithiophosphate (ZDDP) is added to engine lubricants to reduce wear and ensure reliable operation. ZDDP reacts under rubbing conditions to form protective zinc/iron phosphate tribofilms on steel surfaces. Recently, it has been demonstrated that this process can be promoted by applied stresses in lubricated contacts, as well as temperature ...
James P. Ewen, Hugh Spikes, Mao Ueda
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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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Structure of hydrocarbon radicals in zinc dialkyldithiophosphates
Chemistry and Technology of Fuels and Oils, 19711. A study has been made of the infrared absorption spectra of dialkyldithiophosphoric acids containing hydrocarbon radicals of different structure. 2. The valence vibrations of the bonds P= S, P-S, and C-O-(P) correspond to the frequency ranges 651–671, 507–550, and 967–1045 cm−1. 3. The structure of the hydrocarbon radicals
G. G. Kotova +4 more
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Interaction between zinc dialkyldithiophosphate and amine
Lubrication Science, 1989AbstractThis paper reports work on complex formation from ZDP and various aliphatic amines, and their equilibrium states in oil, adsorptivities and antiwear properties are investigated. Complex formation from ZDP and amine was proven by isolation and identification of solid crystals, and various complexes were found from mono‐ and diamines. The complex
M. Shiomi +3 more
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Adsorption Studies With Radiolabeled Zinc Dialkyldithiophosphate
Journal of Tribology, 1986Adsorption 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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