Abstract
This paper reports a study on the effects of concentration and the molecular structure of amines on the antiwear properties of TBP, TCP and TBPi, evaluated with a four‐ball machine. It was found that amines reduce the antiwear properties of P‐containing additives in the order primary>secondary>tertiary amine, and a critical amine concentration exists at which P‐containing additives lose their antiwear properties. XPS analysis indicated that the competitive adsorption of amines onto the rubbed surface causes a reduction of the antiwear properties of P‐containing additives.
| Original language | English |
|---|---|
| Pages (from-to) | 283-290 |
| Number of pages | 8 |
| Journal | Lubrication Science |
| Volume | 6 |
| Issue number | 3 |
| DOIs | |
| State | Published - Apr 1994 |
| Externally published | Yes |
Keywords
- additives
- amines
- antiwear
- four‐ball
- phosphorus
- XPS