polski term (edited): E.P. additive

wytłumaczenie bardziej niż odpowiedź - może ktoś zna fachowy termin polski
może smar/dodatek do pracy w wysokim ciśnieniu? być może tutaj http://www.vento.com.pl/lubcon_zastosowania.php coś jest

a tu wytłumaczenie:

http://www.rtvanderbilt.com/petro_2.htm
np.:
Antiwear and EP additive for steel mill and other industrial gear oils. Antiwear and extreme pressure additive for petroleum oils and greases. VANLUBE 622 has outstanding extreme pres-sure and antiwear properties in a variety of base lubricants. It will give unusually high Timken, Falex, and 4-Ball EP values at economical concentrations of 1 to 3%. It shows promise as an EP and antiwear additive in automotive gear oils. Radioactive Ring Wear Tests in crankcase oils show VANLUBE 622 to be superior to zinc dithiophosphates at equivalent treating costs. Friction reducer in engine oils and gear oils

i tutaj:
http://www.ez-maintenance.com/resources/Lubrication-of-Power...

Extreme Pressure Additives. Extreme Pressure
(EP) additives work by reacting with the metal to
form a compound which acts a protective layer
on the metal's surface. As this layer is softer
than the metal itself, under extreme pressure
conditions, the compound layer wears away first,
protecting the metal. As this layer is removed,
the EP additive acts to form another layer. In
contrast to the action of antiwear additives, EP
additives control wear instead of preventing it.
Some EP additives, because of their reactive
nature, can be corrosive to brass or copper
containing alloys. To prevent excessive
corrosion, most EP additives are activated by
the excessive heat created during extreme
pressure conditions but do not react at room
temperature.