A number of investigators have
distinguished between wear prevention and EP agents in lubricants. The former are
effective by a
chemical polishing action,
which takes place
at a lower temperature
than does the
formation of antiweld films by EP
agents. A very extensive investigation
of wear prevention
agents, which are effective
in lubricants for two
steel surfaces was reported by
Beeck, et al^9. Calhoun and Murphy^18, who reported
on both anti wear and EP
additives for lubricants found that it was
possible to blend two
or more types
of additives and
attain both properties in the same
composition.
Typical of
anti wear additives are
tricresyl phosphate and Zinc dialkyl dithiophosphate. Such
agents are seldom
used in industrial
gear oils but
are valuable in
lubricants such as
those for jet
turbines where the
oil serves several
mechanisms including gearing.
