Abstract
EXPERIMENTS for determining both the qualities and methods of application of lubricants are sometimes vitiated by being carried out too quickly. An oil behaves quite differently, for example, when introduced in a properly run-in bearing and when used in one that has been recently assembled. A very similar case occurs with oil containing colloidal graphite. This oil when used in a short-duration test may give results which are misleading. It is claimed by the manufacturers of a product of this nature, Messrs. E.G. Acheson, Ltd., Thames House, Millbank, London, S.W.I, that the particles of graphite in colloidal suspension form a slippery surface on the working faces of the parts in contact, but that, due to the stable nature of the lubricant, an appreciable time may be required for the particles to become adsorbed on the surfaces. Research has shown that the rate of adsorption on a metallic base depends, to a great extent, on the viscosity and chemical nature of the carrier, this rate being low for oil of average viscosity and high for water, which has a relatively low viscosity.
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Lubrication Technique. Nature 147, 324 (1941). https://doi.org/10.1038/147324d0
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DOI: https://doi.org/10.1038/147324d0