Abstract
Investigates the influence of the chemical structure of a number of organic compounds of different classes on their lubricating properties and the processes in the friction zone. Uses monohydric, dihydric, and trihydric alcohols, aldehydes, alkylcarboxylic acids, dialkyl ethers, esters of monocarboxylic and dicarboxylic acids, and esters of hydroxy-acids as the lubricating medium. Finds that when friction takes place in a medium consisting of an organic compound that is less active than acids or aldehydes, an equilibrium optimal quantity of acid is formed by tribochemical means, and this tends to give a substantial reduction of the coefficient of friction and wear. Concludes that the formation of carboxyl-containing organic compounds is one of the tribochemical processes that are necessary to improve lubricity.
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