Oxidation of Lubricating Oils.

Zuidema, H Hans

doi:10.1021/cr60120a001

Cited by 61 publications

(46 citation statements)

References 17 publications

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“…Oxidation of the oil occurs in consequence, and the bearing lining will become subject to corrosive attack by the acid and peroxide content created. 6 The choice of bearing material must therefore take into account the extent of its resistance to this type of corrosive attack.…”

Section: (C) Maximum Oil-film Temperaturementioning

confidence: 99%

Materials for Plain Bearings

Pratt¹

1973

International Metallurgical Reviews

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A bearing is interposed between two surfaces in relative motion to minimize the wear by one surface of the other andl or to reduce the friction between them. A plain bearing is made of, or is lined with, a material that achieves this object under conditions of sliding 'contact between it and one or other (or both) of the surfaces. This review is concerned with the materials of such sliding contact bearings only and does not cover the steel of rolling element bearings, which have their own peculiar property requirements.

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Section: (C) Maximum Oil-film Temperaturementioning

confidence: 99%

Materials for Plain Bearings

Pratt¹

1973

International Metallurgical Reviews

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“…The buildup in acidity followed but was somewhat below the oxygen absorption. Agreement with this theory has been expressed in recent reviews by GEORGE and ROBERTSON (9) and by ZUIDEMA (27) who pointed out that rupture of the carbon chain at the point where a hydroperoxide is first formed accounts for both the non-volatile acids and the short chain acids such as formic, acetic, etc., found by FENSKE and co-workers (8).…”

mentioning

confidence: 72%

“…only slightly harmful to apricot leaves. Since oxidation of petroleum oils forms a preponderance of complex acids (27), simple ones could not be present at 10 m.eq./kg. in any of the highly injurious oils used.…”

Section: Effects Of Oxidized Oils Upon Reducing Sugar-sucrose Balancementioning

confidence: 99%

The Relation of Acids and Peroxides in Spray Oils to the Respiration of Sprayed Bean Leaves and the Development of Injury

Johnson¹,

Hoskins²

1952

Plant Physiol.

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“…The autoxidation mechanism of hydrosumed during service is sometimes applied in the maincarbons involves carbon radicals and organic peroxides tenance of industrial lubricants. This technique, the as active intermediates 2) . The active intermediates are so-called "make up of lubricant," can prolong the lifeunstable substances generated at the initial stage of the time of the lubricant if the maintenance is correctly proautoxidation.…”

Section: Introductionmentioning

confidence: 99%

Proposal of Lubricant Maintenance by Monitoring Peroxide Value

Minami

Mori

Katoh

et al. 2009

J. Jpn. Petrol. Inst.

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This preliminary study on the maintenance of industrial lubricants for chemical plant investigated appropriate maintenance through condition monitoring of the lubricants, in particular autoxidation of base oil as the major degradation process. Changes in chemical and physical properties caused by the autoxidation of hydrocarbons were considered in terms of reaction sequence. The roles of antioxidants for maintaining the quality of lubricants were also considered. The reaction mechanism suggested the importance of antioxidants in lubricants during service. Therefore, a new method to diagnose consumption of antioxidant was required. Organic peroxides are reactive species generated during the autoxidation of hydrocarbons at the initial stage and can be quantitatively analyzed by iodometric titration. The peroxide value (POV) is proposed as a new parameter to monitor conditions of lubricants. The POV trace was examined by a model oxidation test of lubricant in the laboratory. Subdivided addition of antioxidants to lubricant before an increase in POV was found to prolong the lifetime of the lubricants. POV in lubricants for compressors in chemical plant was monitored during the regular maintenance process for two years. Increased POV was observed during machine operation. Oil refill reduced the POV of the lubricant to some extent. Changes in total acid number (TAN) of lubricant were closely related to change in POV, whereas other parameters such as viscosity, insoluble contaminants and water contaminants seemed independent of the changes in POV. The utility of the POV trace depended on the conditions of machine operation, but provided early diagnostics of lubricant degradation in some cases.

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Oxidation of Lubricating Oils.

Cited by 61 publications

References 17 publications

Materials for Plain Bearings

Materials for Plain Bearings

The Relation of Acids and Peroxides in Spray Oils to the Respiration of Sprayed Bean Leaves and the Development of Injury

Proposal of Lubricant Maintenance by Monitoring Peroxide Value

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