Some Environmental Factors Affecting Surface Coating Formation with Lubricating Oil Additives
- 1 January 1966
- journal article
- research article
- Published by Taylor & Francis in A S L E Transactions
- Vol. 9 (1), 88-100
- https://doi.org/10.1080/05698196608972125
Abstract
Dynamic friction and static immersion tests in which oil temperature was varied and dynamic friction tests in which load was varied have been run on steel balls with oil blends containing seven commercial additives. Analyses of the ball surfaces by X-ray fluorescence have shown that significant surface coating formation is initiated at calculated surface temperatures of from 250 to 350 F for most of the additives studied. Although the surface coating “thickness” generally increased with temperature, the rate of increase was generally different for the static and dynamic tests. Both surface temperature and mechanical shearing appear to influence the reactions responsible for the surface coatings. Used oil analyses showed that base oil oxidation, additive decomposition, and, in some cases, sludge formation became detectible at temperatures corresponding to the start of significant surface coating formation. The results suggest that in situ polymerization may be an important phenomenon occurring on rubbing surfaces.Keywords
This publication has 16 references indexed in Scilit:
- A Kinetic Study on the Reaction of Labeled Sulfur Compounds with Steel Surfaces during Boundary LubricationA S L E Transactions, 1965
- Chemistry of Boundary Lubrication of Steel by HydrocarbonsA S L E Transactions, 1965
- Effects of Additives on the Friction of Steel on Steel. II. Additive-Base Oil InteractionsA S L E Transactions, 1965
- Determination of micro amounts of zinc, phosphorus, and sulfur in oil-additive decomposition films on bearingsMicrochemical Journal, 1964
- Radiotracers Reveal Activity of Extreme-Pressure Additives in LubricationA S L E Transactions, 1964
- Effects of Additives on the Friction of Steel on Steel I. Surface Topography and Film Composition StudiesA S L E Transactions, 1964
- Influence of Glycol Molecular Configuration on FrictionA S L E Transactions, 1963
- Polymer Formation on Sliding Metals in Air Saturated with Organic VaporsA S L E Transactions, 1962
- Film Formation by an Antiwear Additive in an Automotive EngineA S L E Transactions, 1959
- Cam and Tappet Lubrication. IV–Radioactive Study of Sulfur in the EP FilmA S L E Transactions, 1959