THE PERFORMANCE OF ZINC DITHIOPHOSPHATES AS LUBRICATING OIL ADDITIVES

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Abstract
The use of either sulfur‐or phosphorus‐containing additives in lubricants had its beginning prior to 1920. However, it was not until the late 1930's that metal dithiophosphates, specifically Zinc dialkyl dithiophosphates, began to receive attention as lubricating oil anti‐oxidants and bearing corrosion inhibitors. The anti‐wear characteristics which have put them in the forefront in the last few years, while known then was not required in the internal combustion engines of the time. The current high performance V‐8 engines used with multi‐viscosity graded oils puts great emphasis on all the three functions of anti‐oxidant, bearing corrosion inhibitor and particularly anti‐wear agent.

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