Research progress in tribo-electrochemistry and tribo-electrochemical polishing

Zhai, Wei

doi:10.1007/s11465-007-0080-0

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…The primary practical application of applied electrical potentials in aqueous systems to date has been to the field of material cutting and polishing, including electrolytic grinding (ELG) [131], triboelectrochemical polishing (TEMP) [132], electrolytic in-process dressing (ELID) [133] and electrochemical-mechanical polishing (ECMP) [134]. In ELG and ECMP the metal workpiece is made the anode so that applied oxidising potentials produce metal oxides that are easily removed by abrasion.…”

Section: Aqueous Lubricantsmentioning

confidence: 99%

Triboelectrochemistry: Influence of Applied Electrical Potentials on Friction and Wear of Lubricated Contacts

Spikes

2020

Tribol Lett

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Research on the effects of applied electrical potential on friction and wear, a topic sometimes termed “Triboelectrochemistry”, has been reviewed. Historically, most such research has focussed on aqueous lubricants, whose relatively high electrical conductivities enable use of three-electrode electrochemical kinetic techniques, in which the electrode potential at a single electrode | fluid interface is controlled relative to a suitable reference electrode. This has led to identification of several different mechanisms by which applied electrode potentials can influence friction and wear. Of these, the most practically important are: (i) promotion of adsorption/desorption of polar additives on tribological surfaces by controlling the latters’ surface charges; (ii) stimulation or suppression of redox reactions involving either oxygen or lubricant additives at tribological surfaces. In recent years, there has been growing interest in the effects of applied electrical potentials on rubbing contacts lubricated by non-aqueous lubricants, such as ester- and hydrocarbon-based oils. Two different approaches have been used to study this. In one, a DC potential difference in the mV to V range is applied directly across a thin film, lubricated contact to form a pair of electrode | fluid interfaces. This has been found to promote some additive reactions and to influence friction and wear. However, little systematic exploration has been reported of the underlying processes and generally the electrode potentials at the interfaces have not been well defined. The second approach is to increase the conductivity of non-aqueous lubricants by adding secondary electrolytes and/or using micro/nanoscale electrodes, to enable the use of three-electrode electrochemical methods at single metal | fluid interfaces, with reference and counter electrodes. A recent development has been the introduction of ionic liquids as both base fluids and lubricant additives. These have relatively high electrical conductivities, allowing control of applied electrode potentials of individual metal | fluid interfaces, again with reference and counter electrodes. The broadening use of “green”, aqueous-based lubricants also enlarges the possible future scope of applied electrode potentials in tribology. From research to date, there would appear to be considerable opportunities for using applied electrical potentials both to promote desirable and to supress unwanted lubricant interactions with rubbing surfaces, thereby improving the tribological performance of lubricated machine components. Graphical Abstract

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Section: Aqueous Lubricantsmentioning

confidence: 99%

Triboelectrochemistry: Influence of Applied Electrical Potentials on Friction and Wear of Lubricated Contacts

Spikes

2020

Tribol Lett

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“…In recent decades, researchers tend to focus on new theories and methods to exploring the mechanisms of tribology from the viewpoint of electromagnetics (Xie et al, 2015;Totolin et al, 2016). The impetus for the study comes from industrial needs that an increasing number of sliding parts of machines are frequently with charges or controlled by electromagnetic techniques, for instance, the motor bush, the switch contactor in electric power transmission systems and the magnetic cylinder in magnetic storage systems (Zhai, 2007;. On the other hand, self-generated voltage (SGV) is an inherent characteristic of moving tribo-pairs because of the differences of free electron density and electron work function of metals .…”

Section: Introductionmentioning

confidence: 99%

Effect of electromagnetic field on tribological properties of two lubricating oils containing zinc dithiophosphate

Jiang

Fang

Chen

et al. 2018

ILT

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Purpose This paper aims at understanding tribological properties of lubricating oils doped with zinc dithiophosphate(ZDDP) with and without electromagnetic field impact. Design/methodology/approach The friction and wear properties of the oils formulated with zinc butyloctyl dithiophosphate (T202) or zinc dioctyl dithiophosphate (T203) under electromagnetic field or nonelectromagnetic field were evaluated on a modified four-ball tribotester. The characteristics of the worn surfaces obtained from electromagnetic or nonelectromagnetic field conditions were analyzed by scanning electronic microscopy, energy dispersive spectrometer and X-ray photoelectron spectroscopy. This paper focuses on understanding influence of electromagnetic field on lubrication effect of the ZDDP-formulated oils. Findings The electromagnetic field could effectively facilitate anti-wear and friction-reducing properties of the oils doped with T202 or T203 as compared to those without electromagnetism affection, and the T203-doped oils were more susceptible to the electromagnetic field. The improvement of anti-wear and friction-reducing abilities of the tested oils were mainly attributed to the promoted tribochemical reactions and the modification of the worn surfaces (forming Zn-Fe solid solution) induced by the electromagnetic field. Originality/value This paper has revealed that tribological performances of ZDDP-doped oils could be improved by the electromagnetic field and discussed its lubrication mechanisms. Investigating tribological properties of additives from the viewpoint of electromagnetics is a new attempt, which has significance not only for the choose and designing of additives in electromagnetic condition but also for development of tribological theories and practices.

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RETRACTED ARTICLE: A review of lubricating mechanisms from the perspective of tribo-electrophysics and tribo-electrochemistry

Jiang

Fang

Chen

et al. 2018

Sci. China Technol. Sci.

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Research progress in tribo-electrochemistry and tribo-electrochemical polishing

Cited by 7 publications

References 37 publications

Triboelectrochemistry: Influence of Applied Electrical Potentials on Friction and Wear of Lubricated Contacts

Triboelectrochemistry: Influence of Applied Electrical Potentials on Friction and Wear of Lubricated Contacts

Effect of electromagnetic field on tribological properties of two lubricating oils containing zinc dithiophosphate

RETRACTED ARTICLE: A review of lubricating mechanisms from the perspective of tribo-electrophysics and tribo-electrochemistry

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