Tribological behaviour of an elastomer aged in different oils

Mofidi, Mohammadreza; Kassfeldt, Elisabet; Prakash, Braham

doi:10.1016/j.triboint.2007.11.013

Cited by 50 publications

(56 citation statements)

References 21 publications

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“…For example, the un-swollen HNBR with IRM 903 (naphthenic base oil) as lubricant showed a COF of 0.41 instead of a value of 0.33 with Vitrea 68 (paraffinic base oil). Mofidi et al [2] observed a similar trend with their tests comparing the COF of NBR in the presence of different base fluids. IRM 903 has a middle range of viscosity compared with Vitrea 68, which has high viscosity (the kinematic viscosities of Vitrea 68 and IRM 903 are 68 mm 2 /s and 32 mm 2 /s, respectively, at 40 • C) [2,32,33].…”

Section: Sliding Directionsupporting

confidence: 68%

“…Mofidi et al [2] observed a similar trend with their tests comparing the COF of NBR in the presence of different base fluids. IRM 903 has a middle range of viscosity compared with Vitrea 68, which has high viscosity (the kinematic viscosities of Vitrea 68 and IRM 903 are 68 mm 2 /s and 32 mm 2 /s, respectively, at 40 • C) [2,32,33]. However, Mofidi et al [2] did not find any correlations between the viscosity of the lubricant and the COF.…”

Section: Sliding Directionsupporting

confidence: 68%

“…IRM 903 has a middle range of viscosity compared with Vitrea 68, which has high viscosity (the kinematic viscosities of Vitrea 68 and IRM 903 are 68 mm 2 /s and 32 mm 2 /s, respectively, at 40 • C) [2,32,33]. However, Mofidi et al [2] did not find any correlations between the viscosity of the lubricant and the COF. Therefore, IRM 903 is in fact a lubricant, though less effective than Vitrea 68, and its release from a swollen sample can contribute towards further reduction in friction compared to the un-swollen or de-swollen samples as witnessed in Figure 5b.…”

Section: Sliding Directionmentioning

confidence: 99%

“…Especially, seals prevent the leakage of fluids and/or gas from a machine and contamination of the environment [2]. However, their performance and service life depend on the wear and friction characteristics in use [3]; therefore, tribology (the study of wear, friction, and lubrication) is an important factor for the seal performance and the overall efficiency of a machine [2,3]. It is necessary to reduce the coefficient of friction (COF) and wear rate of rubber composites for better performance [4].…”

Section: Introductionmentioning

confidence: 99%

“…Mofidi et al [2,22] tested the tribological behavior of elastomers aged in different oils (mineral, ester-based, and poly-alpha-olefin (PAO)) [2] and the influence of lubrication on abrasive wear [22]. They observed a higher COF reduction after ageing in ester-based synthetic oils compared with the mineral oils or PAOs for their nitrile butadiene rubber (NBR) used in the experiments [2], and in the lubricated conditions, they observed lower wear and a lower COF [22]. Although hydrogenated nitrile butadiene rubber (HNBR) is a widely used material in the oil and gas industry [1], some previous research efforts examining the effect of swelling-induced ageing on the tribology properties of HNBR are hard to find.…”

Section: Introductionmentioning

confidence: 99%

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Tribological Behavior of HNBR in Oil and Gas Field Applications

et al. 2018

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Abstract:The common usages of elastomeric components in oil and gas field applications are in dynamic atmospheres; especially sealing appliances that are in relative motion when interacting with surfaces. Therefore, their performance and service life mainly depend on the wear and friction characteristics in use. The objective of this scientific work is to identify the effect of swelling-induced ageing on the tribological properties and surface damage mechanisms of hydrogenated nitrile butadiene rubber (HNBR) in contact with different liquids. Furthermore, the investigation of the co-relation between mechanical properties and surface properties in the tested conditions is indispensable. In the swollen state, deteriorated mechanical properties were observed; however, in de-swollen conditions, the mechanical properties were restored. As far as the surface characterization is concerned, when the HNBR was swollen by a standard IRM 903 solvent, its wear was greater compared with the un-swollen specimen (1.1 times) despite the lower coefficient of friction (COF) (reduced by~25%) and surface temperature (reduced by~2.4 • C). In the de-swollen condition, wear was even greater (6 times), but the COF and surface temperature were situated in between those recorded in the swollen and un-swollen conditions. With swelling, greater wear damage and lower COF were observed; higher surface ageing (softness), which eases crack growth, created bigger debris. Under the conditions used, in the de-swollen states, the bulk mechanical properties were almost recovered, in contrast to the surface properties, which were still significantly impaired.

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Section: Sliding Directionsupporting

confidence: 68%

Section: Sliding Directionsupporting

confidence: 68%

Section: Sliding Directionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tribological Behavior of HNBR in Oil and Gas Field Applications

et al. 2018

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Friction and wear behavior of styrene butadiene rubber‐based composites reinforced with microwave‐devulcanized ground tire rubber

Karabörk

Akdemir

2015

J of Applied Polymer Sci

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In this work, the tribological properties of a new material obtained by revulcanization with styrene butadiene rubber (SBR) and devulcanized ground tire rubber (GTR) were investigated. GTR was devulcanized using the microwave method at a constant power while varying the microwave exposure time. Devulcanized rubber (DV-R) and untreated GTR were revulcanized by mixing with SBR at different rates (10, 30, 50 phr). To determine friction and wear characteristics of the samples, pin (ball) on disc and abrasion tests were conducted. Scanning electron microscopy (SEM) was employed to observe the worn surfaces of the composites to correlate the experimental test results to the wear mechanisms. All of these tests and experiments were performed on original vulcanized rubber samples for comparison. The composites exhibited different friction and wear behavior due to morphology, dispersion behavior and devulcanization functionalization of ground tire rubber. In general, DV-R/SBR composites exhibited improvement in both mechanical and tribological properties. However, the enhanced compatibility of DV-R resulting from the specific chemical coupling of DV-R with SBR was crucial for the mechanical, friction and wear properties.

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Oxidation of lubricating oil and its influence on the aging behaviors of fluorine rubber

Guo

Wang

Zhuo

et al. 2022

J of Applied Polymer Sci

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Fluoroelastomer (FKM) has been widely used in aerospace and some particular fields, whose aging is a key problem to influence the service life of the systems. The aging behaviors of FKM in the lubricating oil have been investigated in our previous study. In this work, the influence of intentionally aged or oxidized lubricating oil (A‐O) on the aging process of FKM is reported for the first time comparing with the situation in the fresh oil (F‐O). As the oil medium aged at 200°C for different time, its color, acid number and contact angle with FKM change evidently indicating possible oxidation might occur although the Fourier transform infrared spectrometer (FTIR) has little change. Then, the influence of aged oil medium on the aging behaviors of FKM was further examined. Compared with F‐O, the aging process of FKM in A‐O was significantly accelerated as evidenced by FTIR, tensile strength, mass change, DMA, and macroscopic observation. With the increase of aging temperature from 150 to 200°C, the contrast between A‐O and F‐O conditions become more prominent. Specifically, at 200°C, the crosslinking density and tensile strength of FKM in A‐O decreased by 2.2 × 10−4 mol/cm3 and 2.5 MPa compared to that in F‐O, and the mass change reached to 3.8%, which might be due to the higher amount of oil medium by diffusion into the FKM matrix.

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Tribological behaviour of an elastomer aged in different oils

Cited by 50 publications

References 21 publications

Tribological Behavior of HNBR in Oil and Gas Field Applications

Tribological Behavior of HNBR in Oil and Gas Field Applications

Friction and wear behavior of styrene butadiene rubber‐based composites reinforced with microwave‐devulcanized ground tire rubber

Oxidation of lubricating oil and its influence on the aging behaviors of fluorine rubber

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