Abstract This paper presents a review on issues additivating vegetal oils with friction and anti-wear modifiers. A SWOT analysis reveals the shortcomings of these trend in their modification by help additives. Based research reports available from literature experimental work, authors formulated synthesis how wear modifiers act lubricants especially oils. They discussed influence some added oils, soybean oil rapeseed oil. The conclusion is that additivation still at beginning as reported...

This paper presents the influence of adding black carbon nanopowder (average size 13 nm, PlasmaChem) in soybean oil different massic concentration (0.25 %, 0.50 % and 1 %) on several tribological parameters: friction coefficient wear scar diameter.Tests are done a four-ball machine.The test parameters were load: 100 N, 200 N 300 speed 1000 rpm, 1400 1800 rpm.The balls lime polished, made chrome alloyed steel, having 12.7±0.0005mm diameter, with 64-66 HRC hardness.The sample volume required...

In this work, studies were performed on oxidative stability by determining the transmittance spectra, components and trichomatic coordinates, color differences for grape seed oils (GSO) subjected to a forced oxidation treatment at temperatures of 100 °C 120 °C, 4, 8 10 h. For purpose, constant airflow 30 L/min was used. GSO also flammability tests heated cylindrical surface determine lowest temperature which oil ignites, correlated with highest does not ignite. According results, these are...

Purpose – The purpose of this paper is to establish the influence oil concentration in oil-in-water emulsions on their flammability hot surfaces and viscosity. interest fire test systematization obviously developing due many grades applications fluids new design solutions asking for higher parameters exploitation, including pressure temperature. Higher temperature have a synergic effect risk; thus, special attention has be given selecting based tests. Design/methodology/approach This...

. The authors experimentally determined the influence of temperature and shear rate on dynamic viscosity two vegetable oils (soybean oil, olive oil). hydraulic oil ISO VG 46 was used for comparison. behavior these similar to one, larger rates (30 s-1…80 s-1) higher temperatures (60ºC…90ºC). For lower (3 s-1…30 (30ºC…50ºC), decreases sharper as compared oil. constants in Azian relation Ostwald de-Waele, Herschel–Bulkley Carreau models. Based laboratory data, mathematical models dependence...

For this paper, the authors studied behavior of castor oil, when it accidentally reaches a hot surface. Thus, lowest temperature at which oil ignited least once in three tests and highest did not ignite were determined. To determine as accurately possible these two temperatures, total 29 performed. The procedure complies with ISO 20823:2018 Petroleum related products -Determination flammability characteristics fluids contact surfaces - Manifold ignition test.

This paper presents a tribological characterization in seizure regime for two lubricants (rapeseed oil and rapeseed additivated with 1%wt TiO2). Tests were done on four-ball tester, the load range at tester shaft 500...900 N, step of 50 60 seconds rotational speed 1400 rpm (equivalent to sliding 0.53 m/s). There discussed average value friction coefficient, wear scar diameter (WSD), flash temperature parameter several texture 3D parameters. Till 600 influence additivation is not obvious,...

The objective of this study was to determine the lowest temperature at which hemp seed oil ignited (505°C) and also highest did not ignite in least three tests performed (500°C). tested on a cylindrical surface heated various temperatures. A total 16 were carried out these two temperatures as accurately possible. under procedure complying with ISO 20823:2018, Petroleum related products. Determination flammability characteristics fluids contact hot surfaces. Manifold ignition test.

In this work rice oil was tested when it is dripped onto a high temperature surface. The tests conducted determined the lowest at which ignited and highest did not ignite in three same temperature. results of study show that values evaluated temperatures are major importance regarding use as an eco-friendly lubricant. Thus, ignites 465 °C, while 470 °C. Moreover, end 8 performed, part oils collected tray installations used present were subjected to spectrophotometric tests. Based on obtained...

Due to their excellent characteristics, vegetable oils are successfully used in various formulations of organic lubricants. In this context, the advanced biodegradability and lubricity performance rice oil leads its being considered as a real potential for lubricants industry. However, with other oils, stability bran is strongly influenced by oxidation process. Therefore, aim work was monitorization spectrophotometric techniques. For purpose, tests at elevated temperatures were performed.In...