Antifriction and antiwear characteristics of molybdenum dithiophosphate in engine oils
- Fujian Institute of Testing Technology (China)
Antifriction and antiwear studies of lubricating oil compounded with engine oil additives such as petroleum calcium sulfonate (PCS) metal detergents, polyisobutylene succinimide (PSI) ashless dispersant, zinc dithiophosphate (ZnDTP) antioxidant and molybdenum dithiophosphate (MoDTP) using the four-ball machine (FBM) are reported. The results show that binary or ternary mixtures of MoDTP with ZnDTP, or ZnDTP and dipolyisobutylene succinimide (DPSI) obviously have beneficial effects on the antifriction and antiwear properties of MoDTP. However, binary or ternary mixtures of MoDTP with PCS, multipolyisobutylene succinimide (MPSI), or PCS and ZnDTP show different responses to the MoDTP antifriction and antiwear properties which depend upon different compositions. The molecular structures of the components of the MoDTP additive are analyzed by {sup 31}P-NMR spectroscopy. 18 refs., 11 figs., 4 tabs.
- OSTI ID:
- 229896
- Journal Information:
- Lubrication Engineering, Journal Name: Lubrication Engineering Journal Issue: 10 Vol. 51; ISSN 0024-7154; ISSN LUENAG
- Country of Publication:
- United States
- Language:
- English
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