Lubricating properties of thixotropic systems based on overbased calcium sulphonate

Kobylyansky, E. V.; Mishchuk, O.A.; Ishchuk, Yu. L.

doi:10.1002/ls.3010160308

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…Because of the lubricating properties of the calcite particles, EP/AW additives containing sulfur, phosphorous or zinc may not be needed, Ward [90]. The crystalline calcite consists of ultra-thin calcite layers/ slices of calcium carbonate with great relative surface area have a great surface activity and cover the surface forming a tribo-layer/ ferrite(oxide) structures on the surface, Kobylyansky et al [58]. The thickener makes a viscous deposit of calcium carbonate, Giasson et al [34].…”

Section: Overbased Calcium Sulfonate Complexmentioning

confidence: 99%

Modern advancements in lubricating grease technology

Lugt

2016

Tribology International

154

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Section: Overbased Calcium Sulfonate Complexmentioning

confidence: 99%

Modern advancements in lubricating grease technology

Lugt

2016

Tribology International

154

View full text Add to dashboard Cite

“…The crystalline calcite in the core of calcium sulfonate is composed of ultrathin calcite layers/slices with high surface activity, because of its large surface-to-volume ratio. In the initial stage of the friction process, the crystalline calcium carbonate could easily deposit on the friction interfaces forming the viscous protective film [27]. Then the sulfonate chains show a preferential orientation to the surface and carbonate, that the c axis being perpendicular to the surface.…”

Section: The Effect Of Complex Thickener On Tribological Mechanismmentioning

confidence: 99%

Probing the Synergy of Blended Lithium Complex Soap and Calcium Sulfonate Towards Good Lubrication and Anti-Corrosion Performance

Ren

Zhang

et al. 2020

Tribol Lett

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Thickener plays a significant role on the performance of grease, including rheological property, chemical and thermal stability, colloidal and mechanical stability, and so forth. Here, lithium complex-calcium sulfonate (L/C) greases were synthesized via regulating lithium complex soap and calcium sulfonate in the molar ratio of 1:2, 2:1 and 1:1, along with thickening the polyalphaolefin (PAO40). The physicochemical properties, corrosion resistance and tribological performance were evaluated in detail, with lithium complex grease and calcium sulfonate grease as a comparison. The results show that the as-prepared L/C greases have good corrosion resistance for low-carbon steel due to unique reversed micelles of calcium sulfonate and sealing function. The regulation of lithium complex soap and calcium sulfonate in different molar ratios achieves the considerable adjustability of grease's physicochemical and tribological properties due to the component/structure of thickener and its sensitivity to base oil. The grease with formulation of L/C = 1:2 gives the best lubrication function depending on not only the thickener's component and structure, but also the synergistic lubrication of grease-film and tribo-chemical reaction film composed of Fe 2 O 3 , FeO(OH), CaO, CaCO 3 and LiOH.

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“…Calcium sulfonate complex grease ( CSCG ) has attracted extensive attention due to its excellent shear and tribological properties under high temperature conditions 13 . Moreover, in consideration of its high bearing capacity, good thermal stability and mechanical stability, it has been widely used in high temperature and heavy load applications 14,15 .…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon nano onions on the tribological performance of food‐grade calcium sulfonate complex grease

Wang

Qian

Gong

et al. 2021

Lubrication Science

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To improve the lubricity of the as‐prepared food‐grade calcium‐based grease, the effects of nano‐additive carbon nano onions (CNOs) on the tribological properties are systematically investigated using a ball‐disc wear tester. The properties of CNOs‐containing food‐grade calcium sulfonate complex greases (CSCG‐FG) were characterised by thermogravimetric analyser, rheometer and electrochemical workstation, Listeria monocytogenes, X‐ray photoelectron spectrometer and Raman spectrometer. The results revealed that pure and CNOs‐containing CSCG‐FG were proved to be safe. The average coefficient of friction (aCoF) and wear volume of the disc at CSCG‐FG of 0.10 wt% CNOs were the minimal values, which were 31.4 and 70.0% less than that of pure CSCG‐FG at 25°C and greatly lower than that of similar commercial food‐grade grease. At high temperature, CNOs‐containing CSCG‐FG had lower aCoFs and torques. CSCG‐FG of 0.10 wt% CNOs would be most possibly used in engineering applications and the results will provide valuable insight into developing food‐grade lubricants.

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Lubricating properties of thixotropic systems based on overbased calcium sulphonate

Cited by 10 publications

References 2 publications

Modern advancements in lubricating grease technology

Modern advancements in lubricating grease technology

Probing the Synergy of Blended Lithium Complex Soap and Calcium Sulfonate Towards Good Lubrication and Anti-Corrosion Performance

Effects of carbon nano onions on the tribological performance of food‐grade calcium sulfonate complex grease

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