Study Tribological Properties of MoDTC and Its Interactions With Metal Detergents

2020 ◽  
Vol 142 (12) ◽  
Author(s):  
Dongya Zhang ◽  
Zhongwei Li ◽  
Xian Wei ◽  
Liping Wang ◽  
Jinbao Xu ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Elevated Temperatures ◽  
Engine Oil ◽  
Base Number ◽  
Simulation Test ◽  
Detergency Performance ◽  
Wear Performance ◽  
Base Oil ◽  
Tube Test ◽  
Significant Attention

Abstract Recently, the synergistic tribological properties between molybdenum dialkyldithiocarbamate (MoDTC) and metal detergents have been the focus of significant attention due to the high requirements of engine oil. In this study, an SRV tribometer and four-ball machine were used to study the tribological performance of MoDTC combined with three types of metal detergents with different base numbers. Meanwhile, the detergency of the three metal detergents was also investigated using the hot tube test and crankcase simulation test. The results showed that (i) a high-based detergent possessed an excellent detergency performance compared with that of low-based detergents. (ii) The tribological properties of the base oil with a content of 0.75% MoDTC were superior to those of other contents at elevated temperatures. (iii) The metal detergents with a higher base number showed the best thermal stability, detergency performance, and anti-wear performance among the three types of metal detergents. The anti-wear mechanism was that the synergistic action of active elements in MoDTC and metal detergents promoted the generation of a tribological film.

Effects of phosphorus-free antioxidants on oxidation stability and high-temperature tribological properties of lubricants

2017 ◽  
Vol 231 (12) ◽  
pp. 1527-1536 ◽  
Author(s):  
Wang Liping ◽  
Zhang Dongya ◽  
Wu Hongxing ◽  
Xie Youbai ◽  
Dong Guangneng
Keyword(s):  
Tribological Properties ◽  
Ternary Complex ◽  
Oxidation Stability ◽  
Service Performance ◽  
Engine Oil ◽  
Zinc Dialkyldithiophosphate ◽  
Scanning Calorimetry ◽  
Base Oil ◽  
Hindered Phenol ◽  
Standard Tests

Oxidation stability plays an important role on the engine oil service performance. In this paper, the phosphorus-free antioxidants of diphenylamine, hindered phenol and dibutyldithiocarbamate, combined with zinc dialkyldithiophosphate were added as antioxidants in the base oil and the fully formulated 5W-30 oil, and the oxidation stabilities were evaluated by pressurized differential scanning calorimetry and Romaszewski oil bench oxidation standard tests. Meanwhile, the tribological properties of the fresh and aged oils were evaluated by a SRV tribo-meter. The results indicated that (i) an optimal ternary complex antioxidant of dibutyldithiocarbamate: diphenylamine: hindered phenol (ratio of 2:1:2) displayed good antioxidation property, and (ii) the fully formulated 5W-30 oil containing optimized ratio phosphorus-free antioxidants had better tribological properties than the commercial SN 5W-30 oil.

scholarly journals Tribological properties of synthetic base oil containing polyhedral oligomeric silsesquioxane grafted graphene oxide

RSC Advances ◽  
2018 ◽  
Vol 8 (42) ◽  
pp. 23606-23614 ◽  
Author(s):  
Bo Yu ◽  
Kai Wang ◽  
Yiwen Hu ◽  
Feng Nan ◽  
Jibin Pu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Lubricating Oil ◽  
Wear Performance ◽  
Base Oil ◽  
Oligomeric Silsesquioxane

The dispersion of graphene-based materials in lubricating oil is a prerequisite for improving its friction and wear performance.

Investigation of the high temperature dry sliding wear behavior of graphene nanoplatelets reinforced aluminum matrix composites

2020 ◽  
pp. 002199832097903
Author(s):  
Seçkin Martin ◽  
Sinan Kandemir ◽  
Maksim Antonov
Keyword(s):  
High Temperature ◽  
Tribological Properties ◽  
Solid Lubricant ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Aluminum Matrix ◽  
Graphene Nanoplatelets ◽  
Aluminum Matrix Composites ◽  
Wear Performance ◽  
Ball On Disc

In this study, graphene nanoplatelets (GNPs) with a thickness of 50-100 nm have been utilized to improve the mechanical and tribological properties of A360 alloy due to their extraordinary mechanical properties and solid lubricant nature. For the investigation of tribological properties, ball-on disc tests were carried out at various temperatures including room temperature (RT), 150 °C, and 300 °C. According to the hardness and ball-on-disc test results, the nanocomposite samples reinforced with GNPs exhibited improved hardness and wear resistance. The improvement in the wear behavior of nanocomposites was referred to the temporarily formed solid lubricant film of harder GNPs during the wear, and hence coefficient of friction (COF) and volume loss were considerably reduced. Abrasive-adhesive, oxidative, and mild-to-severe were found to be main wear mechanisms at RT, 150 °C, and 300 °C, respectively. Overall, the results show that the nanocomposites fabricated by casting method combined with mechanical stirring and ultrasonication have promising wear performance, especially at elevated temperatures. This may suggest that these developed materials could be potential candidates to be used in the engineering applications requiring high temperature wear performance.

Tribological properties and action mechanism of a highly hydrolytically stable N-containing heterocyclic borate ester

2016 ◽  
Vol 68 (5) ◽  
pp. 569-576 ◽  
Author(s):  
Fu-Wang Yang ◽  
Jiang-Min Huang ◽  
Guan-Jun Zhang ◽  
Chenxi Zhang ◽  
Dong-Lan Sun ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Hydrolytic Stability ◽  
Engine Oil ◽  
Wear Property ◽  
Extreme Pressure ◽  
Content Type ◽  
Base Oil ◽  
Borate Ester ◽  
Borate Esters ◽  
The Stability

Purpose The phosphorus and zinc contained in zinc dialkyl dithiophosphate (ZDDP) caused severe environment pollution and catalyst poison. Thus, the phosphorus-free additive, such as borate esters, has become one of studying hot topics in the area of oil additive. However, the stability of hydrolysis greatly limited the use of borate esters. The purpose of this paper is to improve the stability of hydrolysis by synthesizing a new kind of N-containing heterocyclic borate ester (MTTDB) as a lubricant additive. Design/methodology/approach The tribological properties of novel borate ester (MTTDB) as an additive in the base oil were studied by a four-ball machine. The element composition and chemical state of the tribofilm were investigated by scanning electron microscopy, energy dispersive spectrometer and X-ray photoelectron spectroscopy. Findings The results showed that the base oil lubricated by MTTDB exhibited high hydrolytic stability, good anti-wear property and excellent extreme pressure performance. When 2.5 per cent MTTDB was added into the 100N base oil, the smallest wear scar diameter (0.46 mm) was obtained. Furthermore, the decomposed borate ester, organic sulfide adsorbed on the worn surface was detected, and S element reacted with the steel surface and generated FeSO4, both of which contributed to the formation of the tribofilm. Originality/value Based on N-containing heterocyclic compounds, for instance, thiadiazole derivatives, introducing nitrogen and sulfur elements into borate ester, a new kind of N-containing heterocyclic borate ester (MTTDB) exhibited excellent property in hydrolysis stability, friction-reducing, anti-wear and extreme pressure. This synthesized method would be helpful for the borate ester used as additive in engine oil, gear oil and other industrial lubricants.

Experimental investigation of effect of biodiesel fatty acid methyl ester on performance of engine oil dispersant additive

2020 ◽  
pp. 146808742096432
Author(s):  
Boshui Chen ◽  
Fangfang Jie ◽  
Xiaoqing Li ◽  
Chunyu Song ◽  
Tianxi He ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Elevated Temperatures ◽  
Negative Impact ◽  
Chemical Species ◽  
Acid Methyl Ester ◽  
Engine Oil ◽  
Base Oil ◽  
Oil Dispersant ◽  
Acid Methyl ◽  
Dispersant Additive

In the present work, blends of methyl oleate (MO), polyisobutylene-bis-succinimide (PIBSI) and a mineral lubricant base oil were oxidized and some of their physicochemical properties were evaluated to understand the effects of biodiesel fatty acid methyl esters on the performance of the engine oil dispersant additive PIBSI. The oxidation experimentations of blends were conducted under elevated temperatures. Thereafter, the viscosity and acidity of fresh and oxidized blends were determined. The dispersancy, thermal stability and chemical species of oxidized samples were tested and analyzed by the blotter spot method, a TGA, and a GC/MS, respectively. Results showed that the viscosity and acidity of blends containing MO increased significantly after oxidation. The dispersing ability of PIBSI was markedly impaired by only a small amount of MO in a blend. In addition, the thermal characteristics of blends were altered by MO. Many varieties of oxygenated chemicals in the oxidized blend containing MO were detected. The negative impact of MO on performances of PIBSI was attributed to the accelerated oxidation caused by MO, and to the chemical interactions between MO and PIBSI. The present results demonstrated that PIBSI was incompatible with MO.

Enhanced Anti-Wear Performance Induced by Innovative Base Oil in Low Viscosity Engine Oil

2017 ◽  
Vol 10 (3) ◽  
Author(s):  
Nicolas Champagne ◽  
Nicolas Obrecht ◽  
Arup Gangopadhyay ◽  
Rob Zdrodowski ◽  
Z Liu
Keyword(s):  
Engine Oil ◽  
Wear Performance ◽  
Base Oil ◽  
Low Viscosity

Base Oil and Additive Effects in the Thermo-oxidation Engine Oil Simulation Test (TEOST)

1996 ◽  
Author(s):  
A J. Stipanovic ◽  
J. P Schoonmaker ◽  
E. F de Paz ◽  
J K Mowlem ◽  
J E Broas ◽  
...  
Keyword(s):  
Engine Oil ◽  
Additive Effects ◽  
Simulation Test ◽  
Base Oil

Effect of Compatibility between AlN Nanoparticles and Borated Bis-Succinimide on Tribological Properties of Base Oil

2014 ◽  
Vol 952 ◽  
pp. 29-33
Author(s):  
Heng Wang
Keyword(s):  
Aluminum Nitride ◽  
Tribological Properties ◽  
Carrying Capacity ◽  
Antiwear Additive ◽  
Experimental Results ◽  
Load Carrying Capacity ◽  
Wear Performance ◽  
Base Oil ◽  
Load Carrying

The purpose of the research was to investigate effect of compatibility between AlN nanoparticles and borated bis-succinimide on tribological properties of base oil. The load-carrying capacity and anti-wear (AW) performance of base oil that contains aluminum nitride (AlN) nanoparticles or borated bis-succinimide (T152B) additive was examined; the tribological properties of the compatibility between AlN and T152B were also examined. The experimental results showed that AlN nanoparticles additive can effectively improve load-carrying capacity and anti-wear performance of base oil. AlN nanoparticles and T152B compatibility experiments showed that two additives have synergies to improve anti-wear performance of base oil. These findings indicate that AlN nanopaticles is an excellent load-carrying capacity and antiwear additive, and it can be used with T152B together in base oil.

scholarly journals Mechanism To Reduce Friction/Wear of Diesel Engines By Adding Nanoparticles

2020 ◽  
Vol 9 (5) ◽  
pp. 161-164
Keyword(s):  
Tribological Properties ◽  
Testing Machine ◽  
Mineral Oil ◽  
Engine Oil ◽  
Wear Properties ◽  
Nickel Oxide Nanoparticles ◽  
Base Oil ◽  
Oil Additives ◽  
Wear And Friction ◽  
Nanoparticle Additives

Present study was carried out for knowing how nanotechnology can be employed for improving the performances in tribology. A significant number of investigations have been reported on the effect of nanoparticles as oil additives. The wear and friction tests were carried on four ball oil tester using ZDDP, NiO and MoS2 nanoparticles in 1wt% combination with mineral oil to provides the reduction in friction and wear. Much of the research suggests that even up to 1% concentrations of such particles are instrumental in reducing wear and friction. Nanoparticle additives have proved to be promising for development of Tribological properties of mineral oil. The tribological properties of typical engine oil like SAE15W40 mineral oil added with nanoparticle additives were studied and then experimental analysis was done. Investigations were performed on oil having concentrations of Zinc Dialkyl Dithio Phosphate, Molybdenum Disulfide and Nickel Oxide nanoparticles and their combinations to find that anti wear properties are improved. The evaluation of the tribological behavior pertaining to friction was determined using four ball oil testing machine TR-30L containing combination of above described nanoparticles together in base oil showed the most promising results

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