The Effect of Oxidation on the Tribological Performance of Few Vegetable Oils

Mannekote, Jagadeesh K.; Kailas, Satish V.

doi:10.1016/s2238-7854(12)70017-0

Cited by 83 publications

(39 citation statements)

References 8 publications

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“…The lower oxidation time of SBO compared to PO is due to the existence of higher unsaturated fatty acids which may promote oxidation. The inferior performance of PO and SBO in the oxidative stability test compared to commercial MO validates the vegetable oils downside that may influence their tribological performances as oxidised oil could increase the wear 11 .…”

Section: Figure 12mentioning

confidence: 77%

Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

Bahari

Lewis

Slatter

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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Although many studies investigating the tribological performance of pure vegetable oils have been conducted, a better understanding of vegetable oil tribological performance at extreme conditions is still needed. Similarly, little work has been carried out to study the influence of the vegetable oils on the performance of a lubricant formed from a blend of vegetable oil and conventional mineral engine oil. This work presents the tribological performance of vegetable oils, and their blends with mineral oil, in a high temperature and contact pressure reciprocating contact. Palm and soybean based vegetable oils were mixed with a commercial mineral engine oil at a 1:1 ratio by volume. The conventional mineral oil was also tested to provide a benchmark. The pure palm oil exhibited lower friction than soybean oil, but for wear performance, this was reversed. The friction performance of the palm oil was competitive to that of the mineral engine oil. The mineral engine oil was far superior in wear resistance over both vegetable oils. When blended with mineral engine oil both vegetable oils demonstrated a reduction in coefficient of friction when compared to their pure oil states. An improvement in wear performance was observed for both a blend of palm oil and mineral engine oil (25% improvement) and that of soybean and mineral engine oil (27% improvement). This work shows that for palm oil and soybean oil, the performance of a blended oil is influenced by its vegetable oil component and that tribological characteristics of vegetable oils are dominant. That said, the significant limitation of these vegetable oils is their ability to provide a satisfactory level of wear resistance. It is suggested that any future work in this area should have a greater emphasis on the enhancement of wear resistance.

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Section: Figure 12mentioning

confidence: 77%

Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

Bahari

Lewis

Slatter

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The effects of thermo-oxidation of some bio-oils on their tribological performance have been investigated previously. Mannekote and Kailas [19] studied the effect of oxidation on the tribological performance of groundnut, palm, rice bran, soybean, and sesame oils. The oils were thermally aged by heating them at 60, 80 and 100 °C in a dark oven for 14, 28, and 42 days.…”

Section: Introductionmentioning

confidence: 99%

Effects of Jatropha lubricant thermo-oxidation on the tribological behaviour of engine cylinder liners as measured by a reciprocating friction test

Farfán-Cabrera

Gallardo-Hernández

Perez‐González

et al. 2019

Wear

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Bio-lubricants have emerged as a potential and viable way to replace, totally or partially, mineral oils due to their effectiveness in the boundary lubrication regime for different applications, including, automotive engine operation. However, the effect of thermo-oxidation caused by the long-term use of the bio-lubricants on their tribological properties has been scarcely analyzed. In this work, the effect of thermo-oxidation of Jatropha oil (JO), an engine mineral oil (EMO) and a blend made up of 80%vol. EMO and 20%vol. JO (B20) on the tribological behavior of a simulated piston ring/engine cylinder liner interface was studied in reciprocating friction tests at 26 and 100°C. The oils were thermally oxidized and characterized in terms of carbonyl compounds, depletion of ZDDP additives, changes in kinematic viscosity and viscosity index. Friction coefficients, wear rates and scar morphologies were assessed. Thermo-oxidation resulted in significant viscosity increases in JO compared to EMO and B20. Also, it generated increased friction coefficients for JO and B20. However, they were lower than those for fresh and aged EMO. EMO increased the wear rate after thermo-oxidation in contrast to JO. Smearing was generated using most oil samples while severe scuffing was only produced by using fresh JO at 100°C.

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“…The reduction in coefficient of friction is due the presence of free fatty acids (Fox et al, 2004). The increase in wear is due to the formation of peroxides at high temperature (Mannekote and Kailas, 2012). The coefficient of friction decreases with increase in unsaturation.…”

Section: Resultsmentioning

confidence: 99%

“…In this paper we are assessing the oxidative stability of rice bran oil in comparison with sunflower oil and commercially available mineral oil, SAE20W40 using hot oil oxidation test and differential scanning calorimetry. In hot oil oxidation test the accelerated aging of vegetable oil samples was simulated by storing the samples in a dark oven at 100 • C for 96 h. This method is based on the versions of American Oil Chemists Society (AOCS Cd-12-57) recommended practice (Ruger et al, 2002;Mannekote and Kailas, 2012).…”

Section: Oxidative Stabilitymentioning

confidence: 99%

Evaluation of physiochemical and tribological properties of rice bran oil – biodegradable and potential base stoke for industrial lubricants

Rani

Joy

Nair

2015

Industrial Crops and Products

158

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The Effect of Oxidation on the Tribological Performance of Few Vegetable Oils

Cited by 83 publications

References 8 publications

Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

Effects of Jatropha lubricant thermo-oxidation on the tribological behaviour of engine cylinder liners as measured by a reciprocating friction test

Evaluation of physiochemical and tribological properties of rice bran oil – biodegradable and potential base stoke for industrial lubricants

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