Effect of lubricants on micropitting and wear

Lainé, Emmanuel; Olver, A.D.; Beveridge, T. A.

doi:10.1016/j.triboint.2008.03.016

Cited by 96 publications

(82 citation statements)

References 16 publications

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“…Furthermore, AW additives have been shown to accelerate micropitting [33][34][35][36]. ZDDP can rapidly form a tribofilm on the surface resulting in a delayed effect on proper running-in wear and increasing the probability of asperity-asperity contact.…”

Section: The Effect Of Zddp and Water On Micropittingmentioning

confidence: 99%

“…In comparison to longitudinal or isotropic roughness of the counterbody (rings), a transverse roughness is shown to accelerate the micropitting incipient on the contact body (roller) having a smoother surface compared to counterbody in the bearings [33,35] and gears [41]. Slide-to-roll ratio of two percent is set for the all experiments carried out in the Ring current study in accordance to Morales et al [35] report showing that the slide-to-roll ratio of 0.01-0.02 can prompt the maximum surface area affected by micropitting wear.…”

Section: Experimental Set Up I Micropitting Testsmentioning

confidence: 99%

See 1 more Smart Citation

Tribochemical study of micropitting in tribocorrosive lubricated contacts: The influence of water and relative humidity

Soltanahmadi

Morina

Eijk

et al. 2017

Tribology International

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Water ingress into the lubricant as a contaminant affects performance leading to an alteration in wear, corrosion and fatigue behaviour of the tribological components especially in the rolling element bearings. The current study addresses the tribochemical phenomena involved in micropitting in tribocorrosion systems where different levels of dissolved-water are present in a model lubricant. In this study the effect of different temperatures, water concentrations and relative humidities have been investigated on micropitting under rolling/sliding contacts. The influence of free and dissolved water on tribocorrosive micropitting is clarified. The tribochemical change of the reaction films is studied using X-ray Photoelectron Spectroscopy (XPS) which confirmed that the (poly)phosphate chain length and tribofilm thickness are reduced with increased dissolved-water level.

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Section: The Effect Of Zddp and Water On Micropittingmentioning

confidence: 99%

Section: Experimental Set Up I Micropitting Testsmentioning

confidence: 99%

Tribochemical study of micropitting in tribocorrosive lubricated contacts: The influence of water and relative humidity

Soltanahmadi

Morina

Eijk

et al. 2017

Tribology International

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“…Some additives such as anti-wear and extreme pressure additives are known to promote micropitting [8,9,[43][44][45]. In particular, Laine et al [44] and Benyajati et al [45] showed that the anti-wear additive, zinc dialkyldithophosphate (ZDDP), causes micropitting to become more severe compared to a simple base stock.…”

Section: The Effect Of Lubricant Additives On Hydrogen Permeationmentioning

confidence: 99%

“…In particular, Laine et al [44] and Benyajati et al [45] showed that the anti-wear additive, zinc dialkyldithophosphate (ZDDP), causes micropitting to become more severe compared to a simple base stock. Spikes et al…”

Section: The Effect Of Lubricant Additives On Hydrogen Permeationmentioning

confidence: 99%

Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

Esfahani

Morina

Han³

et al. 2017

Tribology International

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Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact, Tribiology International, http://dx.doi.org/10. 1016/j.triboint.2017.01.019 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…The MPR is adjustable and can be run under various conditions suitable for screening fluids for micro-and macro-pitting performance [8,9]. The conditions implemented in this study are outlined in Table 2.…”

Section: Mpr Pitting Test Protocolmentioning

confidence: 99%

The Effect of Poly(alkyl methacrylate) Film-Formers on Pitting Performance of Driveline Fluids

Krapfl

Shakhvorostov

Langston³

et al. 2012

Tribology Online

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Driven by diminishing fossil fuel resources, global warming and subsequently rigid legislation on CO 2 emission, fuel economy is a major challenge for the automotive industry. Each element of the powertrain has been optimized or newly designed to increase efficiency. In this optimization process the engine oils and transmission fluids are important design elements and their contribution to improved efficiency is significant. Polyalkylmethacrylates (PAMAs) are widely used as viscosity index improvers in engine, transmission and hydraulic oils. They have been shown to adsorb from oil solution onto metal surfaces to produce thick and viscous boundary films. These films are maintained even in low speed and high temperature conditions and thus produce a reduction of friction and wear. It was found that specifically designed film-forming PAMAs can improve pitting performance of lubricant formulations. The paper describes the impact of tailor-made functionalized PAMAs on boundary film formation and explores their ability to increase the fatigue life of lubricants.

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Effect of lubricants on micropitting and wear

Cited by 96 publications

References 16 publications

Tribochemical study of micropitting in tribocorrosive lubricated contacts: The influence of water and relative humidity

Tribochemical study of micropitting in tribocorrosive lubricated contacts: The influence of water and relative humidity

Development of a novel in-situ technique for hydrogen uptake evaluation from a lubricated tribocontact

The Effect of Poly(alkyl methacrylate) Film-Formers on Pitting Performance of Driveline Fluids

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