Antiwear and Extreme-Pressure Action of Copper(II) Complex With Alkyl Phosphonic Acid Mono Alkyl Ester

The copper(II) complex with alkylphosphonic acid monoalkyl ester (CuAMP) was synthesized, and its structure shown to be laminar on the basis of fast atom bombardment mass spectroscopy (FABMS). The extreme-pressure, antiwear and antiseizure performance of CuAMP was assessed using a four-ball machine. The results showed that CuAMP exhibits better extreme-pressure and antiwear properties than tricresyl phosphate. Based on the results of surface analysis, the antiwear action mechanism of CuAMP is discussed.

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The Synergistic Antiwear Performances of Organic Titanium Compounds Containing Sulfur with Borate Ester Additive

Journal of Spectroscopy ◽

10.1155/2018/2576896 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 2

Author(s):

Xin Xu ◽

Jian-Qiang Hu ◽

Feng Xie ◽

Li Guo ◽

Jun Ma ◽

...

Keyword(s):

Effective Interaction ◽

Extreme Pressure ◽

X Ray ◽

Borate Ester ◽

Load Carrying ◽

Antiwear Properties ◽

Chemical States ◽

Titanium Compounds ◽

Scanning Electron ◽

Mineral Base

Two oil-soluble organic titanium compounds (OTCs) such as titanium dialkyldithiocarbamate (TiDDC) and sulfurized titanate (TiS) were synthesized and identified by Fourier-transform infrared spectroscopy (FTIR). The antiwear and extreme pressure properties of TiDDC or TiS with borate ester containing nitrogen (BNO) additive in mineral base oils were evaluated by four ball tester. The results show that TiDDC and TiS not only possess good antiwear and load-carrying properties, respectively, but also exhibit good antiwear synergism with BNO additive without impairing extreme pressure performances. Moreover, the synergistic antiwear properties of the said additives are improved significantly under the optimum additives ratios. The topography of wear scar and the composition and chemical states of typical elements on the rubbing surfaces were analyzed by scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) and X-ray photoelectron spectrometer (XPS). The proposed synergistic antiwear mechanism involves an effective interaction between TiDDC or TiS and BNO additive, respectively.

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The antiwear and extreme pressure action mechanism of CeF3 in grease

Lubrication Science ◽

10.1002/ls.3010080406 ◽

1996 ◽

Vol 8 (4) ◽

pp. 379-388 ◽

Cited By ~ 1

Author(s):

Lain Yafeng ◽

Xue Qunji ◽

Zhang Xushou

Keyword(s):

Extreme Pressure ◽

Action Mechanism

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Tribological Study of Xanthate-Containing Acetic Ester as Additives in Hydrogenated Oil

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.236-237.123 ◽

2012 ◽

Vol 236-237 ◽

pp. 123-127 ◽

Cited By ~ 1

Author(s):

Chao Long Li ◽

Li Ping Xiong ◽

Hong Liu ◽

Li Ting Xiong ◽

Wei Wang

Keyword(s):

Photoelectron Spectroscopy ◽

Protective Film ◽

Extreme Pressure ◽

Action Mechanism ◽

Prepared Compound ◽

X Ray ◽

Hydrogenated Oil ◽

Worn Surface ◽

Scanning Electron ◽

Sem Analyses

A novel ester derivative, dodecyl xanthate acetic dodecyl xanthate ester(DXAD) was synthesized and it’s tribological behaviors as additives in hydrogenated oil, were evaluated using a four-ball tester. Results show that the compound possesses good antiwear performance, extreme pressure capacity, and good friction-reducing property. The action mechanism was estimated through analysis of the worn surface with X-ray photoelectron spectroscopy (XPS) and Scanning Electron Microscope (SEM). The results of XPS and SEM analyses illustrate that the prepared compound as an additive in hydrogenated oil forms a protective film containing ferric sulfide and ferric sulfate compounds on the rubbed surface.

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