Tribological behaviors and mechanism of sulfur- and phosphorus-free organic molybdate ester with zinc dialkyldithiophosphate

A review of recent developments of friction modifiers for liquid lubricants (2007–present)

“…However, it can effectively improve friction-reducing and anti-wear properties when combined with ZDDP due to the formation of MoS 2 on the rubbing surface by the tribochemical reaction of 6 and ZDDP [37,38]. Although the above organomolybdenum compounds can be used as highly efficient friction modifiers, it is urgent to reduce or eliminate the harmful elements (such as phosphorus and sulfur) in lubricant additives and develop the environment-friendly additives without reducing the wear and friction performances [39][40][41].…”

Evaluation of physiochemical and tribological properties of rice bran oil – biodegradable and potential base stoke for industrial lubricants

“…Synergic effect of organic molebdate ester with zinc dialkyl dithiophosphate as an anti wear additive was established in rapseed oil (Hua et al, 2008). Tyrosine derivatives are proven to be an effective antiwear additive in rapseed oil (Zeng et al, 2007).…”

Tribological and Antioxidation Synergistic Effect Study of Sulfonate-Modified Nano Calcium Carbonate

“…The nanoparticles of CaCO 3 can deposite on the shearing surface because of the high surface energy of the fresh worn surface, and the complicated tribochemical reaction that had occurred in reaction system. The additive molecules have been decomposed [20], the sulphonic acid group reacts with the metal surface forming sulphate, sulphide and ferrite film, the inorganic film has high hardness, which made the tribological surface film acquired higher load-carrying capacity. And the calcium carbonate reacts with iron oxide and fresh iron on the worn surface to generate calcium oxide and ferrite calcium.…”