A review of ultrafine particles as antiwear additives and friction modifiers in lubricating oils

1999 ◽  
Vol 11 (3) ◽  
pp. 217-226 ◽  
Author(s):  
Qiu Sunqing ◽  
Dong Junxiu ◽  
Cheng Guoxu
Keyword(s):  
Ultrafine Particles ◽  
Antiwear Additives ◽  
Friction Modifiers ◽  
Lubricating Oils

New ashless antiwear additives for lubricating oils

1979 ◽  
Vol 15 (8) ◽  
pp. 601-603 ◽  
Author(s):  
T. A. Rogachevskaya ◽  
V. L. Lashkhi ◽  
A. B. Vipper ◽  
T. G. Malysheva ◽  
E. V. Kaidala ◽  
...  
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils

Certain aspects of the mechanism of antiwear additives for lubricating oils

1976 ◽  
Vol 12 (9) ◽  
pp. 723-727 ◽  
Author(s):  
V. L. Lashkhi ◽  
A. B. Vipper ◽  
A. A. Markov ◽  
V. A. Trofimov ◽  
F. N. Ermolov
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils

Effect of Friction Modifiers and Antiwear Additives on the Tribological Performance of a Hydrogenated DLC Coating

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
T. Haque ◽  
A. Morina ◽  
A. Neville
Keyword(s):  
Photoelectron Spectroscopy ◽  
Analytical Techniques ◽  
Antiwear Additives ◽  
Friction Modifiers ◽  
X Ray ◽  
Dlc Coating ◽  
Wear Protection ◽  
Effect Of Additives ◽  
Carbon Coated ◽  
Coated Surfaces

There has been a lot of attention on the effect of lubricant additives on the friction at carbon coated surfaces. But only few papers have addressed the effect of additives on the durability of some diamondlike carbon DLC coatings. This paper presents a systematic study assessing the additive/additive and additive/surface interactions, and their influences on the durability of a low hydrogen-containing (15 at. % hydrogen) metal-free DLC coating (a-C:15H). In this study, lubricating oils containing a zinc dithiophosphate (ZDDP) antiwear additive and/or organomolybdenum friction modifiers (moly dimer and moly trimer) were used. Tribological tests were carried out in a pin-on-plate tribometer under boundary lubrication conditions. To understand the effect of additives, tribofilms formed on the wear tracks were analyzed using surface sensitive analytical techniques such as atomic force microscope, scanning electron microscopy, energy dispersive X-ray analysis, X-ray photoelectron spectroscopy, and Raman spectroscopy. Results showed that the ZDDP formed a zinc phosphate containing an ultrathin antiwear tribofilm, which offered excellent durability/wear protection to the a-C:15H coating. However, the antiwear performance of this additive was compromised when it was used with moly dimer or moly trimer. Surface analysis revealed that unlike steel surfaces, MoS2 formed on the DLC surfaces had negligible influence on friction, while the low friction DLC wear debris had strong influence on friction. Abrasive wear was found to be the dominating wear mechanism in the cases when additives showed poor wear protection on the a-C:15H coating.

Amidothiophosphates as antifraction and antiwear additives for lubricating oils

1982 ◽  
Vol 18 (4) ◽  
pp. 174-176 ◽  
Author(s):  
A. B. Vipper ◽  
P. S. Belov ◽  
V. L. Lashkhi ◽  
V. A. Parfenova ◽  
I. V. Blokhina ◽  
...  
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils

IR specteoscopic study of esters of phosphonic acids used as antiwear additives for lubricating oils

1977 ◽  
Vol 13 (5) ◽  
pp. 369-371
Author(s):  
V. L. Lashkhi ◽  
K. A. Egorova ◽  
Yu. A. Lozovoi ◽  
A. B. Vipper ◽  
E. S. Shepeleva
Keyword(s):  
Antiwear Additives ◽  
Phosphonic Acids ◽  
Lubricating Oils

Antiwear additives and corrosion inhibitors for lubricating oils

1984 ◽  
Vol 20 (4) ◽  
pp. 196-200 ◽  
Author(s):  
O. S. Stepuro ◽  
I. Yu. Rebrov ◽  
S. B. Borshchevskii ◽  
O. L. Mikhailova
Keyword(s):  
Corrosion Inhibitors ◽  
Antiwear Additives ◽  
Lubricating Oils

Organotin derivatives of alkylphenols as antiwear additives for lubricating oils

1977 ◽  
Vol 13 (4) ◽  
pp. 289-292 ◽  
Author(s):  
V. L. Lashkhi ◽  
O. N. Tsvetkov ◽  
F. N. Ermolov ◽  
N. N. Komarova ◽  
A. B. Vipper ◽  
...  
Keyword(s):  
Antiwear Additives ◽  
Lubricating Oils ◽  
Derivatives Of

scholarly journals ESTIMATION OF INTERRELATION BETWEEN STRUCTURE OF SOME NITROGEN-CONTAINING ALKYLARYL-SUBSTITUTED PHENOLS AND THEIR REACTIVITY AND FUNCTIONAL PROPERTIES

2017 ◽  
Vol 60 (5) ◽  
pp. 51
Author(s):  
Elbay R. Babaev
Keyword(s):  
Functional Properties ◽  
Quantum Chemical ◽  
Antioxidant Properties ◽  
Antiwear Additives ◽  
Test Machine ◽  
Substituted Phenols ◽  
Lubricating Oils ◽  
Derivatives Of ◽  
Lubricating Properties ◽  
Model Reactions

The paper describes the results of the research of some N-containing 2,6-di-a-methylbenzylphenols as antioxidants, antimicrobial and antiwear additives to the lubricating oils. In the model reactions of oxidation of hydrocarbons it has been earlier shown the efficiency of some nitrogen-containing derivatives of α-methylbenzyl-substituted phenols. As it can be seen from the results of research of mechanism of inhibiting action  of three 4-N-substituted aminomethyl-2,6-di-α-methylbenzylphenols they have  approximate antiradical efficiency, К7=6-6.5.104 l/mol×s (60 °С), exceeding К7 of ionol (2.2·104 l/mol×s). The stoichiometric inhibition coefficients are f=2-2.6. 2,6-di-α-methylbenzyl-4-diethylaminomethylphenol has the highest reactivity and high catalytic factor. The same conclusion can be drawn from the results of quantum chemical calculations. To confirm the found regularities, they were tested in lubricating oils as antioxidants. Antimicrobial properties of the investigated compounds were studied in the composition of vaseline oil. The synthesized aminomethyl derivatives of 2,6-di-α-methylbenzylphenol at a concentration of 0.5-1% ensure the stability of the vaseline oil to biodeterioration, show antimicrobial, more antifungal activity. These compounds show better efficiency than the biocide used in practice - sodium pentachlorophenolate. The lubricating properties of the test compounds were evaluated by the wear spot diameter (Dw) on Four-Ball Wear Test Machine in accordance with RF State Standard 9490-75. Investigations of antiwear properties have shown that these compounds, along with antioxidant properties, have also lubricating properties. They are better than the known additive for the similar purpose - tricresyl phosphate in anti-wear efficiency. The analysis of interrelations of kinetic indicators (rate constant, stoichiometric coefficients), obtained in the model reactions of inhibition of hydrocarbons oxidation with quantum chemical parameters of inhibitors molecular structure (enthalpy, electron population, dipole moment) antioxidant and anti microbial properties of compounds in vaseline oil has been conducted..For citation:Babaev E.R. Estimation of interrelation between structure of some nitrogen-containing alkylaryl-substituted phenols and their reactivity and functional properties. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 5. P. 51-56

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