What are EP additives? Can they be harmful to machinery?
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- Опубликовано: 28 май 2024
- EP additives are very common in industrial gear oils. But what are they? How are they different from standard Zinc and Boron antiwear additives? How are they affected by temperature, and what are the risks in using an EP gear oil?
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man, I have been searching for some info on greases for a month now, as I am learning some repair skills, and it seems like your channel is the only thing on youtube that teaches that. Everything else is just macho "my corvette is the best corvette" ego nonsense.
Thanks! Trying to add a new topic or two each week so hopefully it suits your needs.
can you expalin the difference and areas of use between EP additives, Antiwear additives and Friction Modifiers?
Another great informative video. Thanks
Thanks for watching!
Please explain the reaction mechanism of different ep types of additives and working range of each additives
Can you suggest some materials to add to geease
The example you mean in the last part of this video with the copper strip 2a of the astm test. Does it mean that it is not ok? Should it be in the range of 1a/1b to function well?
Really depends on hours in use. For new oil you wouldn’t allow it, but if it’s toward the end of an oil drain a 2A is reasonable.
Love your videos man,so i am wondering if wear deposits/very fine metal particles that visible to the eye on used oil is normal? Or does it mean that the additives of my gear oil that i am currently using is lacking the ability to prevent metal-to-metal contact and i should change the oil viscosity in case that the oil lubricating film is too thin?
Visible sediment is usually not a good thing. If you can, hold a magnet to the sample and see if the particles are attracted. If they are, it's Ferrous debris and a sign of excessive wear. If not, there's a good chance the particles are soot or dirt.
@@LubricationExplained Thanks for replying,will definitely try it in the next oil change. What troubles me is that i already use the recommended viscosity from the manual book. Perhaps i should increase the oil viscosity from 75w85 to 80w90
@@alto2086 Pay attention to the GL-4 or GL-5 GL-MT1 spec, they are not generally interchangeable due to the copper-bronze issue and seal compatibility. I have heard that for some producers 75-85 and 80-90 are often a different underlying spec, not simply a slight change in viscosity. Secondly there is the issue of actual conditions of use, slow speeds result in thinner lubricant films. Then there is intermittent loading and shock loading such that the viscosity is correct most of the time but is occasionally insufficient, often this can be addressed with an additive like moly or graphite which are solids in suspension that protect against brief losses of lubricating film.
thanks for the video!
No worries!
Yes, another nice video..thak you sir.
Thanks!
I love ur videos, really full of info , but ur tone is,, well , let's say it make me so sleepy , which I end up select the CC to read rather than hearing.
Other wise ur videos are amazing.
🤣 Will have to drink a red bull before the next recording. Thanks for the feedback!
@@LubricationExplained 😂
A hand slowly goes up in the back of the room…Is the service life of an EP Additive determined by a quantitative or qualitative factor (?) in a lubricant for an automotive engine or gear application?
Sorry didn’t fully understand the question? Will try to answer though - service life would be dictated by load (higher load would “scrape” off more material), speed (more revs = more action), temperature (determines speed of the additive chemical reaction), and type of gearbox (more sliding = higher EP wear).
@@LubricationExplained Apologies for being vague. The consumer is bombarded by companies with the “quality” of additives in various lubricants, all service conditions and applications being equal, is it the quality of the additive or the volume (percentage) that extends or shortens service life of a lubricant?
you mean antiwear zddps dont do this polishing effect that ep additive does?
Not so much. There isn't a clear distinction between the two, but in general terms, ZDDP adds a sacrificial layer on top of the metal surface, whereas EP additives react with and "corrode" the metal surface somewhat.
when you say anthing "below a 1B", this oil would not be suitable ....." I think you meant anything "ABOVE" 1b
Ahh, good point, thanks for that. Was thinking "below" as in "worse" rather than alphabetically.