Effect of MoDDP on the antioxidative properties of ZnDDP in mineral oil

Du, D. C.; Kim, S. S.; Suh, Chang‐Min; Chun, Jung Sik; Moon, Woo-Sik; Kwon, Wan Seop

doi:10.1002/ls.3010160208

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…Molybdenum dialkyldithiophosphate (MoDDP) is a typical friction modifier which is often used in many industrial and automotive applications to reduce frictional energy losses [4]. A lot of experimental results have shown that it can reduce friction and increase durability of metal surfaces by forming a tribofilm [5][6][7][8][9][10][11]. Previous results have demonstrated that MoDDP reaction films could produce low friction coefficient (less than 0.05) after a few running cycles [8].…”

Section: Introductionmentioning

confidence: 99%

The Synergetic Effects of Surface Texturing and MoDDP Additive Applied to Ball-on-Disk Friction Subject to Both Flooded and Starved Lubrication Conditions

et al. 2017

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This paper reports a novel work on the synergetic effects of microscale surface texturing and lubricant friction modifier additive of molybdenum dialkyldithiophosphate (MoDDP) subject to both flooded and starved lubrication conditions. The experiments were performed on reciprocating ball-on-disk friction in GTL8 base oil with and without MoDDP. In the flooded lubrication condition, the test results demonstrated that the presence of the MoDDP additive contributed to lower friction coefficients, and also more pronounced effect of surface textures on friction than in the case of the bare base oil. In the starved lubrication experiments, textured and texture-free surfaces in the oils with and without MoDDP additive were tested until an abrupt rising of friction coefficient was detected. The results showed that the magnitude of friction coefficient before terminating each test was the almost same for various tests, while the endurance time in different test conditions was significantly different. The textured surface exhibited longer endurance time than the texture-free surface, especially when the MoDDP additive was used. The mechanism of the synergetic effects of surface textures and MoDDP additive has been discussed based on the experimental observations in the following sections. This study provides a new idea for the application of surface texture in boundary lubrication when lubricant additive is contained in the lubricating oils.

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Section: Introductionmentioning

confidence: 99%

The Synergetic Effects of Surface Texturing and MoDDP Additive Applied to Ball-on-Disk Friction Subject to Both Flooded and Starved Lubrication Conditions

et al. 2017

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Chiral Heterobimetallic Gold(I) Ferrocenyldithiophosphonato Complexes

Karakuş

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Hildebrand

et al. 2011

Zeitschrift anorg allge chemie

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Chiral and non‐chiral ferrocenyldithiophosphonates [tBuNH3][Fe(η5‐C5H5){η5‐C5H4P(OR)S2}] were prepared from [Fe(η5‐C5H5){η5‐C5H4PS(μ‐S)}]2 and the respective alcohol ROH [R = bornyl (1), myrtenyl (2), adamantyl (3)] and tBuNH2 as base. The reaction with [AuCl(tht)] (tht = tetrahydrothiophene) gave the corresponding chiral (1a, 2a) and non‐chiral (3a) heterobimetallic dimeric gold(I) ferrocenyldithiophosphonato complexes [Au{Fe(η5‐C5H5)(η5‐C5H4P(OR)(μ‐S)2)}]2 [R = bornyl (1a), myrtenyl (2a), adamantyl (3a)]. Compounds 1–3 and 1a–3a were characterised spectroscopically (IR, 1H, 13C, 31P NMR) and by mass spectrometry, and the chiral heterobimetallic dimeric gold(I) ferrocenyldithiophosphonato complex 1a was also structurally characterised by X‐ray crystallography.

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