Evaluation of Wear Products Produced by Some Chemical Reactions in Boundary Lubrication

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Abstract
Previous studies of boundary lubrication with hydrocarbon-type lubricants and other “nonreactive” lubricants have identified the role of dissolved oxygen and water in the chemical reactions at the bearing surface. Additional studies with hydrocarbon-type lubricants and steel bearing surfaces have been used to show reaction products between constituents of the liquid lubricant and the metal products surface as well as between dissolved oxygen and the bearing surface. The test methods and analytical techniques necessary to show these small quantities of reaction products are also described.