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This report describes a study on effect of lead stearate on wear of metals in sliding under lubrication.Firstly, effect of added quantities of lead stearate on coefficient of boundary friction and oil film strength was investigated. From the result, critical quantity for added lead stearate which made these values uniform was acquired to be 0.2%Secondly, pressure-wear and velocity-wear characteristic curves were investigated in using lubricating oil. From the result, it was obtained that the contact pressure at stabilized limit of wear mechanism was 50kg/cm2 at the oil temperature of 20°C and 3.40m/s in sliding velocity and that this is 30kg/cm2 at the temperature of 50°C. The pressure values were higher than that by simple base oil. Lead stearate at oil temperature of 50°C was found to effect the most effective action on wear. Also, nearly the same tendenicy was obtained in wear of long distance. In summary, it was found that lead stearate had excellent lubricating facilities in the field of mild wear.

Influence of Lead Stearate Additive in Lubricating Oil on Wear of Metals