Role of additives and transition metals in lubricating oil oxidation

Colclough, T.

doi:10.1021/ie00069a028

Cited by 90 publications

(61 citation statements)

References 14 publications

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“…Ferrocene derivatives such as 1,1'-dicarbomethoxyferrocene show a synergic effect with cobalt dryer during the oxidation of ethyl linoleate (Stava et al 2007). Soluble iron has been reported to be a much better catalyst compared to iron wire or powder (Colclough 1987).…”

Section: Role Of Other Metals On Oxidation Reactionsmentioning

confidence: 99%

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Low temperature oxidation of linseed oil: a review

et al. 2012

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This review analyses and summarises the previous investigations on the oxidation of linseed oil and the self-heating of cotton and other materials impregnated with the oil. It discusses the composition and chemical structure of linseed oil, including its drying properties. The review describes several experimental methods used to test the propensity of the oil to induce spontaneous heating and ignition of lignocellulosic materials soaked with the oil. It covers the thermal ignition of the lignocellulosic substrates impregnated with the oil and it critically evaluates the analytical methods applied to investigate the oxidation reactions of linseed oil. Initiation of radical chains by singlet oxygen ( 1 Δ g ), and their propagation underpin the mechanism of oxidation of linseed oil, leading to the self-heating and formation of volatile organic species and higher molecular weight compounds. The review also discusses the role of metal complexes of cobalt, iron and manganese in catalysing the oxidative drying of linseed oil, summarising some kinetic parameters such as the rate constants of the peroxidation reactions. With respect to fire safety, the classical theory of self-ignition does not account for radical and catalytic reactions and appears to offer limited insights into the autoignition of lignocellulosic materials soaked with linseed oil. New theoretical and numerical treatments of oxidation of such materials need to be developed. The self-ignition induced by linseed oil is predicated on the presence of both a metal catalyst and a lignocellulosic substrate, and the absence of any prior thermal treatment of the oil, which destroys both peroxy radicals and singlet O 2 sensitisers. An overview of peroxyl chemistry included in the article will be useful to those working in areas of fire science, paint drying, indoor air quality, biofuels and lipid oxidation.

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Section: Role Of Other Metals On Oxidation Reactionsmentioning

confidence: 99%

“…For example, this effect is displayed by zinc dialkyldithiocarbamate (ZDC) (Colclough 1987). Flavonoids and tocopherol demonstrate antioxidant effects on the lipid oxidation, since the phenolic hydrogens in those substances can react with lipid free radicals (Belhaj et al 2010).…”

Section: Inhibitors For Oxidation Of Oilsmentioning

confidence: 99%

Low temperature oxidation of linseed oil: a review

et al. 2012

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“…Colelough 18 suggests the following catalytic reactions 18 and Naidu 19 find the presence of soluble iron as in organometallic complexes, to take part in catalytic action of Fe 3+ to degrade oil. The insoluble iron oxide Fe 2 O 3 is also known 20 to act as a catalyst to generate excess radicals.…”

Section: Resultsmentioning

confidence: 99%

Lubricant Degradation and Related Wear of a Steel Pin in Lubricated Sliding Against a Steel Disc

Singh

Gandra

Schneider

et al. 2011

ACS Appl. Mater. Interfaces

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In lubricated sliding contacts, components wear out and the lubricating oil ages with time. The present work explores the interactive influence between lubricant aging and component wear. The flat face of a steel pin is slid against a rotating steel disk under near isothermal conditions while the contact is immersed in a reservoir of lubricant (hexadecane). The chemical changes in the oil with time are measured by vibrational spectroscopy and gas chromatography. The corresponding chemistry of the pin surface is recorded using X-ray photoelectron spectroscopy while the morphology of the worn pins; surface and subsurface, are observed using a combination of focused ion beam milling and scanning electron microscopy. When compared to thermal auto-oxidation of the lubricant alone, steel on steel friction and wear are found to accentuate the decomposition of oil and to reduce the beneficial impact of antioxidants. The catalytic action of nascent iron, an outcome of pin wear and disk wear, is shown to contribute to this detrimental effect. Over long periods of sliding, the decomposition products of lubricant aging on their own, as well as in conjunction with their products of reaction with iron, generate a thick tribofilm that is highly protective in terms of friction and wear.

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“…Therefore, if zinc dialkyl dithiophosphate can be protected from oxidation by the use of alternative antioxidants, the overall antiwear performance of the lubricant may be improved. Zinc dialkyl dithiophosphate is the main antioxidant for lubricants (Bridgewater et al, 1980;Sexton and Perkins, 1984;Colclough, 1987).…”

Section: Introductionmentioning

confidence: 99%

The Oxidation Stability of Lubricating Oil

Eissa

Basta

Ibrahim

2010

Petroleum Science and Technology

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Lubricating oil is generated throughout the year and collected in central locations in many communities. The studied lube oil has a boiling range of 280 ı C-400 ı C, and its physical properties were determined according to standard test methods in ASTM and International Petroleum. Solvent extraction by furfural was carried out using different feed ratios. The best ratio was 1:4 (sample:furfural). The oil was separated into its components using liquid column chromatography. It was found that the aromatic contents decreased. The structure group analysis was determined by infrared spectroscopy and refractive index-density-molecular weight methods. The oxidation stability was carried out according to ASTM method D-48 using an inhibitor. The inhibitor used was a nonionic surfactant, alkanolamide. The results showed that the oxidation stability improved using the inhibitor.

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Role of additives and transition metals in lubricating oil oxidation

Cited by 90 publications

References 14 publications

Low temperature oxidation of linseed oil: a review

Low temperature oxidation of linseed oil: a review

Lubricant Degradation and Related Wear of a Steel Pin in Lubricated Sliding Against a Steel Disc

The Oxidation Stability of Lubricating Oil

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