Base Oil Effects on Friction Reducing Capabilities of Molybdenum Dialkyldithiocarbamate Containing Engine Oils

1997 ◽  
Author(s):  
Milton D. Johnson ◽  
Ronald K. Jensen ◽  
Stefan Korcek
Keyword(s):  
Base Oil ◽  
Engine Oils ◽  
Friction Reducing

Lubricated tribology of hybrid AMMC–steel sliding contact: A comparative investigation between fully formulated commercial engine oils and surfactant functionalized MWCNT–base oil formulation

2020 ◽  
pp. 135065011990122
Author(s):  
H Singh ◽  
H Bhowmick
Keyword(s):  
Comparative Investigation ◽  
Industrial Applications ◽  
Sliding Contact ◽  
X Ray Diffraction ◽  
Multiwalled Carbon ◽  
Base Oil ◽  
X Ray ◽  
Engine Oils ◽  
Aluminum Metal Matrix Composite ◽  
Oil Formulation

The aim of the present study is to investigate the feasibility of developing surfactant-assisted multiwalled carbon nanotube (MWCNT)-laden lubricant for hybrid aluminum metal matrix composite (h-AMMC)/steel (EN31) pair sliding contact. For the preliminary screening, three grade-I base oils, two SAE grade fully formulated commercial oils, and two types of particle additives are used for the tribological investigation. Based on the detailed pilot study, a suitable grade of base oil (SN500), a fully-formulated commercial oil (SAE 20W50) and a solid particle additive (MWCNT) are finalized for the comprehensive tribological investigation. An amphiphilic surfactant, Sorbitan mono-oleate (SPAN 80) is added to MWCNT-in-oil dispersion to functionalize the MWCNT particles. For better insight of the lubrication and friction-wear mechanism, thermophysical properties of prepared suspensions and characterization of the worn-out surfaces of h-AMMC is carried out using various techniques such as scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy. The study reveals some interesting insights on the performance of MWCNT-laden lubricants in the presence of surfactant, which might be connoted for the future development of the lubricants to be used in the industrial applications.

Improving the Performance of Gas Engine Oils: A New Generation of Geo-Specific Additive Systems

2003 ◽  
Author(s):  
Laurent Chambard ◽  
John Smythe
Keyword(s):  
High Performance ◽  
Additive Technologies ◽  
Performance Limits ◽  
Base Oil ◽  
Gas Engine ◽  
Engine Oils ◽  
Base Oils ◽  
Beaten Track ◽  
Excellent Control ◽  
New Generation

Additive technologies able to successfully lubricate gas engines have been available for many years, but in recent years the acceleration of both commercial and technical demands placed on gas engine lubricants has highlighted the performance limits of traditional additive solutions. One of these limits is the ability to reach long and very long oil drains, required by an increasing number of operators. Since traditional additive chemistries on conventional base oil systems have reached their limits in that respect, focus has been increasingly placed on using higher performance base oils so that longer oil drains can be reached. However, traditional additive chemistries have often proved to struggle in these higher performance base oils, particularly in the aspect of deposit control — demonstrating that a new generation of additive systems for the formulation of gas engine oils is needed. The authors present one such generation of additive systems, developed around off-the-beaten-track detergent technology; providing superior control of oxidation and deposits. Such additive systems can be used either in conventional base oil systems with improved drain interval, or in high performance base oil systems with very long drain interval and excellent control of deposits. Besides the description of the chemistry involved, the authors also present a methodology of performance evaluation in the laboratory, and compare this methodology with the performance perceived in the field.

Preparation and tribological properties of a kind of lubricant containing cerium borate nanoparticles as additives

2019 ◽  
Vol 234 (11) ◽  
pp. 1789-1797 ◽  
Author(s):  
Lifeng Hao ◽  
Feng Cao ◽  
Zewen Jiang ◽  
Jiusheng Li ◽  
Tianhui Ren
Keyword(s):  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Lubricant Additive ◽  
Wear Property ◽  
Reaction Products ◽  
Tribochemical Reaction ◽  
Base Oil ◽  
Reducing Ability ◽  
Borate Ester ◽  
Friction Reducing

Oil-soluble compounds containing boron as lubricating additives were restricted by the hydrolysis of borate ester. In order to overcome this problem, cerium borate nanoparticles modified with oleic acid (O-CeB) as a potential substitute for conventional lubricant additive were studied in detail. The microstructures of the prepared nanoparticles were characterized. Tribological properties of cerium borate nanoparticles used as additive in base oil were evaluated, and the worn surface of the steel ball was investigated. The results show that O-CeB possesses better anti-wear ability at relatively higher concentration; in particular, it shows better friction-reducing ability under all these studied concentrations. Under higher load, its anti-wear property and friction-reducing property are better than that of Vanlube 289 in the base oil. Based on these results of interferometric surface profilometer and X-ray photoelectron spectroscopy, it can be deduced that a continuous resistance film containing depositions and the tribochemical reaction products was formed during the sliding process.

Pressure-assisted synthesis of a polyaniline–graphite oxide (PANI–GO) hybrid and its friction reducing behavior in liquid paraffin (LP)

2018 ◽  
Vol 42 (2) ◽  
pp. 936-942 ◽  
Author(s):  
Lei Liu ◽  
Wei Zhou ◽  
Yongwei Chen ◽  
Songlong Jiao ◽  
Peng Huang
Keyword(s):  
Graphite Oxide ◽  
Liquid Paraffin ◽  
Optimum Concentration ◽  
Friction Property ◽  
Base Oil ◽  
Friction Reducing

PANI–GO hybrids were prepared via a pressure-assisted method, which can significantly enhance the anti-friction property of base oil at the optimum concentration of 0.012 wt%.

scholarly journals Tribological Behavior of Lamellar Molybdenum Trioxide as a Lubricant Additive

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2427 ◽  
Author(s):  
Wei Tang ◽  
Rui Liu ◽  
Xiangyong Lu ◽  
Shaogang Zhang ◽  
Songyong Liu
Keyword(s):  
Friction And Wear ◽  
Molybdenum Trioxide ◽  
Tribological Behavior ◽  
Normal Load ◽  
Lubricant Additive ◽  
Base Oil ◽  
Reducing Ability ◽  
Wear Reduction ◽  
Friction Reducing ◽  
Friction And Wear Tests

In this study, the tribological behavior of lamellar MoO3 as a lubricant additive was investigated under different concentrations, particle sizes, normal loads, velocity, and temperature. The friction and wear tests were performed using a tribometer and with a reciprocating motion. The results indicate that the friction-reducing ability and antiwear property of the base oil can be improved effectively with the addition of lamellar MoO3. The 0.5 wt % and 0.1 wt % concentrations of MoO3 yield the best antifriction and antiwear effects, respectively. The maximum friction and wear reduction is 19.8% and 55.9%, compared with that of the base oil. It is also found the MoO3 additive can decrease the friction considerably under a high velocity and normal load, and increase the working temperature. The smaller the size of MoO3, the better the friction-reducing effect the lamellar MoO3 shows. The friction-reducing and antiwear mechanisms of lamellar MoO3 were discussed.

Friction Reducing Potential of Low Viscosity Engine Oils in Bearings

1996 ◽  
Author(s):  
Jagadish Sorab ◽  
Stefan Korcek ◽  
Calvin L Brower ◽  
William G. Hammerle
Keyword(s):  
Engine Oils ◽  
Low Viscosity ◽  
Friction Reducing ◽  
Reducing Potential

Effects of antiwear additives in the base oil on the tribological performance of hydrogen-free DLC coating

2014 ◽  
Vol 66 (6) ◽  
pp. 633-639 ◽  
Author(s):  
Edward Ng ◽  
Sujeet Kumar Sinha
Keyword(s):  
Detrimental Effect ◽  
Antiwear Additives ◽  
Dlc Coatings ◽  
Content Type ◽  
Base Oil ◽  
Engine Oils ◽  
Dlc Coating ◽  
Hydraulic Fluids ◽  
Coated Surface ◽  
Exhaust After Treatment

Purpose – The purpose of this study is to investigate the effects of zinc dialkyl dithiophophates (ZDDP) and ash-less triphenyl phosphorothionate (TPPT) on hydrogen-free diamond-like carbon (DLC) coatings. For many years, ZDDP have traditionally been used in engine oils as antiwear (AW) and extreme pressure (EP) additives. However, additives containing sulfated ash, phosphorus and sulfur (SAPS) have a detrimental effect on the exhaust after-treatment device found on modern vehicles. Besides the automotive industry, DLC is also used in hydraulic applications where zinc-free and ash-less hydraulic fluids have gradually gained popularity in recent years. Design/methodology/approach – The tribological tests were performed using a disk-on-cylinder tribometer, where the stationary hydrogen-free DLC-coated steel disk formed a line contact with an uncoated rotating steel shaft under lubricated conditions. Findings – It was found that TPPT and ZDDP separately at a concentration of 1.0 wt% increased the amount of friction of the base oil by approximately four times. TPPT appeared more effective than ZDDP in minimizing wear on the DLC-coated surface. Also, primary ZDDP seemed to have a more detrimental effect on the DLC-coated surface compared to a mixture of primary and secondary ZDDP. With regard to surface roughness of the hydrogen-free DLC-coated surface, the values corresponding to a lubricant containing TPPT were lower than those obtained for a lubricant with ZDDP and a lubricant without any additive. Originality/value – This is the first report on the effects of ZDDP and ash-less TPPT on the tribology of hydrogen-free DLC coatings.

Vegetable oil-based cutting fluids and its behavioral characteristics in machining processes: a review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
P. Pranav ◽  
E. Sneha ◽  
S. Rani
Keyword(s):  
Friction And Wear ◽  
Mineral Oil ◽  
Industrial Sector ◽  
Cutting Fluids ◽  
Machining Processes ◽  
Content Type ◽  
Base Oil ◽  
Engine Oils ◽  
Mineral Oils

Purpose This paper aims to provide a detailed review of various cutting fluids (CFs). Design/methodology/approach Friction and wear are inevitable in machine parts in motion. The industrial sector uses various kinds of lubricants, which include engine oils, CFs, hydraulic fluids, greases, etc. to control friction and wear. The main purpose of using CF is to remove heat produced during machining and to reduce cutting forces, tool wear and energy associated with it. Thus, it increases the productivity and quality of the manufacturing process. But more than 80% of the CFs used in the industries now are mineral oil-based. These mineral oils and additives are highly undesirable because of their toxicity, nonbiodegradability, pollution and ecological problems. Hence, these petroleum-based oils in the lubrication system can be substituted with alternatives such as vegetable-based CF. Several studies are being conducted in the field of eco-friendly CFs. Because of the variance in fatty acid profile and availability, the selection of vegetable oils (VOs) is another problem faced nowadays. The present study is focused on bio-based oils and many eco-friendly additives. Various machining processes and comparisons relating to the same have also been made. The aim is to minimize the use of mineral oil and thereby introduce sustainability in production. Findings In this present study, bio-based oils, additives and various characteristic behavior of them in machining are being discussed. The VOs are found to be a potential base oil for industrial CFs. Originality/value This paper describes the importance of sustainable CFs.

Retention of Friction Reducing Performance of MoDTC-Containing Fuel Efficient Gasoline Engine Oils During Use

2000 ◽  
Author(s):  
Yasuhisa Yamada ◽  
Mitsuaki Ishimaru ◽  
Akira Yaguchi ◽  
Kiyoshi Inoue ◽  
Kenyu Akiyama ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Engine Oils ◽  
Friction Reducing
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