From Wikipedia, the free encyclopedia
(Redirected from AW additive)
|This article does not cite any sources. (December 2009) (Learn how and when to remove this template message)|
Some popular AW additives are:
- zinc dithiophosphate (ZDP)
- zinc dialkyl dithio phosphate (ZDDP), probably the most widely used in formulated engine oils, also acts as a corrosion inhibitor and antioxidant
- Tricresyl phosphate (TCP), used for high-temperature operation, often used as an AW and EP additive in turbine engine lubricants, and also in some crankcase oils and hydraulic fluids
- Halocarbons (chlorinated paraffins), for extreme pressure operations
- Glycerol mono oleate
- Stearic acid, adhering to surfaces via reversible adsorption process under 150 °C, which limits its use to mild contact conditions.
Under extreme pressure conditions, the performance of AW additives becomes insufficient and designated EP additives are required.