Abstract
The interaction of metallic stearates with graphite and molybdenum disulphide (MoS 2) combinations is studied for friction, wear and seizure in four-ball wear and EP testers. The interaction of stearates of chromium, copper and aluminium with solid lubricants has been shown to be beneficial in reducing wear and friction, and can reduce seizure, whereas stearates of sodium and tin have shown the reverse effect. Other stearates showed a mixed trend. It is seen that the formation of a coating over the rubbing surfaces is beneficial in reducing the tendency to seizure. The combined effect of some metal stearates with graphite could provide a similar performance to that obtained with the MoS 2 combination.
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