Soluble molybdenum compound and sulphur ep additive combinations: Synergistic and adverse effects on antifriction and antiwear characteristics

Sarin, Rakesh K.; Gupta, Amit; Sureshbabu, Angara V S; Martin, Vincent; Misra, Ajay; Bhatnagar, A. K.

doi:10.1002/ls.3010050305

Cited by 20 publications

(10 citation statements)

References 14 publications

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“…In most cases, the ligands for Mo are of the 1,1-dithiolate type, including dithiocarbamates, dithiophosphates, and xanthates (55,69). A combination of molybdate and watr soluble sulfies can provide lubrication and corrosion inhibition in cutting fluids and metal forming materials.…”

Section: Usesmentioning

confidence: 99%

Molybdenum Compounds

Stiefel

2011

Kirk-Othmer Encyclopedia of Chemical Technology

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The chemistry of molybdenum (Mo) is among the most diverse of the transition metals. Molybdenum is found naturally mostly as the disulfide. Molybdenum forms binary compounds with many nonmetallic elements and a number of these, namely halides, oxides, sulfides, carbides, nitrides, and silicides are of interest. The most important oxidation states are VI, V, IV, III, II, and 0.Molybdenum is an essential component of many enzymes and plays an important role in nitrogen fixation and nitrite reduction in bacteria and plants and sulfite and xanthine oxidation for microorganisms, plants and animals. Molybdenum compounds are important in lubrication where the disulfide and oil‐soluble Mo sulfur complexes serve as antifriction and antiwear agents. Mo compounds are also used in hydrodesulfurization and hydrotreating catalysis, as oxidation catalysts, in coatings, paints, and pigments as anticorrosion agents, as smoke suppressants, as a soil nutrient, and in nuclear medicine.

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Section: Usesmentioning

confidence: 99%

Molybdenum Compounds

Stiefel

2011

Kirk-Othmer Encyclopedia of Chemical Technology

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“…Molybdenum dialkyldithiocarbamates (MoDTC) are amongst the most important friction‐reducing additives used in lubricating oils . These compounds exist in a variety of molecular arrangements; a dimer structure is represented in Figure .…”

Section: Introductionmentioning

confidence: 99%

Friction and wear performance of MoDTC‐containing and ester‐containing lubricants over steel surfaces under reciprocating conditions

Trindade

Durango

Sinatora

2014

Lubrication Science

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Lubricant oil can be regarded as a complex mixture of base oils and additives, each one with its specific functions and behaviour. In this paper, the interaction of a molybdenum dialkyldithiocarbamate (MoDTC)‐based additive and combinations of a polyalphaolefin and a synthetic ester is investigated. A reciprocating ball‐on‐disc configuration was used for tribological tests. The effect of MoDTC is seen as a sharp drop in the coefficient of friction. This friction reduction is affected by the base fluid: the effect is more intense and lasts longer when the ester content is decreased. The applied normal force also affects the MoDTC effect, which is not sustainable at higher loads. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Many studies on additive and additive interactions have been conducted [11][12][13][14]. These studies examined the synergistic and antagonistic behaviors in various tribological properties in combinations of surface reactive additives [10,15,16].…”

Section: Introductionmentioning

confidence: 99%

Tribological Characteristics of Combined Layered Phosphate and Silicate Additives in Mineral Oil

Chen

Zhang

et al. 2011

Tribol Lett

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A mixture containing a-Zr(HPO 4 ) 2 ÁH 2 O, a small particle layered-phosphate, and a-Na 2 Si 2 O 5 , a microparticle-layered silicate, is investigated for its potential as an additive in mineral oil. A four-ball tester is employed to measure the maximum non-seizure load, wear scar diameter, and friction coefficient of the combined additives. Friction and wear tests indicate that synergistic behavior exists between the two base materials; the load capacity, anti-wear, and friction reducing ability of the base oil are markedly increased when the combined materials are added. More important is the combined materials exhibit considerable advantage over typical lubricant additives, such as MoS 2 and graphite, presenting good application prospects as lubricant additives. The X-ray diffraction, scanning electron microscopy, and energydispersive X-ray spectroscopy results illustrate that the synergistic behavior of the combined material stems from the small a-ZrP particles confined in the valleys of the contacting surfaces that polish the wear surface, as well as the layered a-Na 2 Si 2 O 5 microparticles that effectively fill voids in the wear surface.

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Soluble molybdenum compound and sulphur ep additive combinations: Synergistic and adverse effects on antifriction and antiwear characteristics

Cited by 20 publications

References 14 publications

Molybdenum Compounds

Molybdenum Compounds

Friction and wear performance of MoDTC‐containing and ester‐containing lubricants over steel surfaces under reciprocating conditions

Tribological Characteristics of Combined Layered Phosphate and Silicate Additives in Mineral Oil

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