A Simplified Model of Surface Burnishing and Friction in Repeated Make-Up Process of Premium Tubular Connections

Le, Huirong; Stewart, Fiona; Williams, John A.

doi:10.1007/s11249-015-0562-x

Cited by 5 publications

(6 citation statements)

References 21 publications

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“…Given the low total sliding distance, the phosphate coating and its associated generated tribofilms affect the wear process strongly [ 3 , 11 ]. The wear changes the surface topology of the metal-to-metal seal [ 12 ] and thus influences the subsequent seal ability [ 5 , 13 – 15 ]. The mechanism behind the formation of this tribofilm, its properties, and the influence of the base oil on these properties with the aim of developing an environmentally friendly lubricant is the subject of this paper.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

et al. 2018

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Casing connections in the oil and gas industry are typically coated with zinc and/or manganese phosphate for corrosion protection during storage. The presence of phosphate coatings is also known to give beneficial tribological performance. The coating allows the system to run without problems long after it is worn off. This is because of two mechanisms. Glaze layer formation on the coated surface and, as will be shown, tribofilm formation on the uncoated counter-surface. An investigation into the mechanism behind this tribofilm formation is presented in this paper. The aim is to develop lubricants that exploit these mechanisms. A pin-on-disc set-up was used to investigate the interaction of a manganese phosphated disc and bare counter surface. Six base oils with different polarity and viscosity were used. The resulting tribofilms were analysed using optical microscopy, scanning electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, focused ion beam, and atomic force microscopy. The tribofilm is robust, amorphous, and only forms in the presence of a lubricant under sliding conditions and adsorbs on substrates with a large variation in chemical composition. It is concluded that the tribofilm consists of physisorbed manganese phosphate and formation is shear stress activated.

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Section: Introductionmentioning

confidence: 99%

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

et al. 2018

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“…We have successfully investigated the low-temperature frictional resistance of locally amorphous 4 He crystal (the 3 He addition effects included (Chu, 2012) in microdomains using a verified Eyring model (Eyring, 1936; Krausz and Eyring, 1975; Le et al , 2015; Powell and Eyring, 1944; Subhalakshmi et al , 2008; Sutcliffe, 1991; Zhang and Archer, 2005), which has physical foundation from the thermal activation process (considering certain kind of quantum tunneling which, relates to the matter rearranging by surmounting a potential energy barrier [Eyring, 1936]). In this paper, we shall first verify our approach by comparing our numerical calculation with previous measurements and then we would like to examine the possible low resistance states for MoS 2 solid films via tuning the activation volume.…”

Section: Introductionmentioning

confidence: 99%

Low friction states for thin solid lubricant film of MoS₂

Chu

2018

ILT

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Purpose During the operation of Wendelstein 7-X (W7-X), any mechanical disturbance such as stick-slip may cause quenching of superconducting (SC) coils. The friction behavior of MoS2 lubrication (thin film) for narrow support elements between the SC coils in W7-X is rather important, as there is a design requirement for a coefficient of friction (COF) 0.05 between the sliding surfaces to control the stress contribution (from friction). Design/methodology/approach The author has carried out intensive calibrations or verifications using verified models considering previous friction tests on various samples which measured the COF in 4.2 K, 77 K and room temperature conditions (at high vacuum) to simulate the actual working condition. Findings The author has given useful explanations and diagnosis for previous anomalous scattered data. To improve the performance of MoS2, the author has predicted its better COF (0.002 via tuning of the activation volume), which could be a superlubricating state for MoS2 thin films considering the long-term operation requirement W7-X. Originality/value In this paper, the author has adopted Eyring’s approach to predict the low COF (0.002 via tuning of the activation volume), which could be a superlubricating state for MoS2 thin films considering the long-term operation requirement W7-X. Finally, some recent progresses about the possible few-layer MoS2 role in the electromagnetic loads have been provided.

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“…The suspension was deposited on chromium steel substrate and then dried and cured by thermal imidization in oven. The tribological properties of the nanocomposites were examined using a cross‐cylinder sliding test rig developed by the author and his collaborators …”

Section: Introductionmentioning

confidence: 99%

“…The authors have recently developed a CNT reinforced epoxy composites for offshore pipelines. [23][24][25] The materials exhibit good anti-galling resistance, however, the corrosion resistance is not sufficient for heavily loaded premium connections due to the surface porosity as a results of the difficulty in dispersion of carbon nanotubes. The properties of interest for this application include friction and wear of the material under sliding contact with steel.…”

Section: Introductionmentioning

confidence: 99%

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Tribological properties of nanoclay reinforced polyimide nanocomposite coatings for alloy steels

Meng

2017

Int J Applied Ceramic Tech

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A new process was developed to deposit uniform Montmorillonite nanoclay reinforced polyimide nanocomposite coating on alloy steels. The nanoclay particles were successfully dispersed in N, N-Dimethylacetamide using a combination of magnetic stirring, soaking, and ultrasonic agitation. It was found that the uniform and crack-free coating can be achieved. The tribological tests indicated that the nanocomposite coating has good adhesion to alloy steels, good load carrying capacity, relatively low friction, and wear. This nanocomposite is a promising material for some offshore, aerospace, and automotive structures that are subjected to sliding contact in corrosive environment

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A Simplified Model of Surface Burnishing and Friction in Repeated Make-Up Process of Premium Tubular Connections

Cited by 5 publications

References 21 publications

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

Low friction states for thin solid lubricant film of MoS₂

Tribological properties of nanoclay reinforced polyimide nanocomposite coatings for alloy steels

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A Simplified Model of Surface Burnishing and Friction in Repeated Make-Up Process of Premium Tubular Connections

Cited by 5 publications

References 21 publications

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

Low friction states for thin solid lubricant film of MoS2

Tribological properties of nanoclay reinforced polyimide nanocomposite coatings for alloy steels

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Product

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Low friction states for thin solid lubricant film of MoS₂