Tribological response of fresh and used engine oils: The effect of surface texturing, roughness and fuel type

Cousseau, Tiago; Acero, Juan Sebastian Ruiz; Sinatora, Amilton

doi:10.1016/j.triboint.2015.11.016

Cited by 34 publications

(52 citation statements)

References 26 publications

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“…Considering only the operation temperature of many different type synthetic lubricants, the results reported herein suggest that the compounds synthesized are, along with many other vegetable oil‐based biolubricants, potential alternatives to mineral oil‐based products, able to be used under elevated temperature and oxidative conditions. [ 35 ]…”

Section: Resultsmentioning

confidence: 99%

“…The friction values (less than 0.25) for these oils are typical of tests carried out in the boundary lubrication regime with commercial base oils. [ 35 ]…”

Section: Resultsmentioning

confidence: 99%

“…This technique is effective for evaluating if the abrasion also altered the metallic surface in atomic levels, that is, promoting oxidation. [ 35,39 ]…”

Section: Resultsmentioning

confidence: 99%

“…These spectra evidenced the oxidation of the surfaces lubricated with Cdn ( 1 ), Cdn‐E ( 2 ), Cdn‐OA ( 3 ), and Cdn‐A ( 5 ), by the formation of hematite (α‐Fe 2 O 3 ) and magnetite (Fe 3 O 4 ), indicated by the appearance of peaks at approximately 670 and 1310 cm −1 , that can be associated to the formation of iron oxides in Fe +2 and Fe +3 states, respectively, as also depicted in Figure 9. [ 35,39 ]…”

Section: Resultsmentioning

confidence: 99%

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Development of Fully Bio‐Based Lubricants from Agro‐Industrial Residues under Environmentally Friendly Processes

Almeida

Silva

Kotzebue

et al. 2020

Euro J Lipid Sci & Tech

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Biolubricants are becoming interesting alternatives to mineral lubricants. Despite their advantages, development of lubricants from vegetable oils may compete with food production, turning their use impractical due to socio-economic aspects. Here, cardanol is used as raw material in the synthesis of novel biolubricants under environmentally friendly conditions. These compounds are characterized by NMR and Fourier transform infrared spectroscopy. Thermal-oxidative studies show the elevated stability and higher onset oxidative temperatures. Tribological analyses performed under high-frequency linear-oscillation motion indicate lower coefficients of friction and wear rates compared to a synthetic oil. Therefore, cardanol, under simple, fast, and sustainable processes can be transformed into valuable alternatives for petroleum-based lubricants. Practical Applications: The novel cardanol-based biolubricants presented in this work show interesting chemical and lubricity properties superior to standard synthetic oils, which make them potential substitutes for the current oil-based products used as lubricants. Additionally, the ecofriendly methodologies employed reduce significantly the reaction time as well as eliminating the need for catalysts or solvents, making these processes viable alternatives for the traditional methods reported in literature for the synthesis of this class of compounds.

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Section: Resultsmentioning

confidence: 99%

“…The friction values (less than 0.25) for these oils are typical of tests carried out in the boundary lubrication regime with commercial base oils. [ 35 ]…”

Section: Resultsmentioning

confidence: 99%

“…This technique is effective for evaluating if the abrasion also altered the metallic surface in atomic levels, that is, promoting oxidation. [ 35,39 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Development of Fully Bio‐Based Lubricants from Agro‐Industrial Residues under Environmentally Friendly Processes

Almeida

Silva

Kotzebue

et al. 2020

Euro J Lipid Sci & Tech

Self Cite

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show abstract

“…Cousseau et al [28] reported that MoS2 was only formed when rough surfaces were used and that no MoS2 was formed when smooth surfaces were used. It should however be noted that in the mentioned study, tests were conducted with a fully formulated oil unlike tests conducted in this study where only MoDTC in base oil was used.…”

Section: Effect On Modtc Decompositionmentioning

confidence: 99%

The role of surface roughness and slide-roll ratio on the decomposition of MoDTC in tribological contacts

Khaemba

Jarnias²,

Thiébaut³

et al. 2017

J. Phys. D: Appl. Phys.

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In this study, the role of surface roughness and slide-roll ratio in the decomposition and friction performance of molybdenum dialkyldithiocarbamate (MoDTC) has been investigated. Tribotests were carried out in a minitraction machine (MTM) using steel discs of varying roughness rubbing against smooth steel balls in a sliding/rolling contact. Tests were conducted at slide-roll ratio (SRR) values of SRR = 100% and 200%. Raman spectroscopy was used to perform chemical characterisation on the resulting wear scars. The friction performance of rough discs was not affected by the SRR. On the other hand, increasing the SRR from 100% to 200% in tests with smooth discs resulted in higher friction with large instabilities. Raman analysis showed significant differences in chemical composition of the wear scars generated after tests with smooth and rough discs. Wear scars generated using rough discs were mainly composed of MoS 2 indicating complete MoDTC decomposition while those generated using smooth discs were composed of a mixture of MoS 2 , MoS x (x > 2) and FeMoO 4 indicating partial MoDTC decomposition. Numerical simulation of the contact revealed that under similar loading conditions rough surfaces have higher local pressures than smoother surfaces. It is proposed that higher local pressures in rough surfaces promoted complete MoDTC decomposition. The novel finding from results presented in this study is that at similar temperature and MoDTC concentration, the degradation of MoDTC within tribocontacts is highly dependent on the roughness of the tribopair. This is because surface roughness determines the local pressure at the asperity-asperity contact.

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Engine Oils in the Field: A Comprehensive Chemical Assessment of Engine Oil Degradation in a Passenger Car

et al. 2019

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Tribological response of fresh and used engine oils: The effect of surface texturing, roughness and fuel type

Cited by 34 publications

References 26 publications

Development of Fully Bio‐Based Lubricants from Agro‐Industrial Residues under Environmentally Friendly Processes

Development of Fully Bio‐Based Lubricants from Agro‐Industrial Residues under Environmentally Friendly Processes

The role of surface roughness and slide-roll ratio on the decomposition of MoDTC in tribological contacts

Engine Oils in the Field: A Comprehensive Chemical Assessment of Engine Oil Degradation in a Passenger Car

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