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Surface potential effects on friction and abrasion of sliding contacts lubricated by aqueous solutions

Surface potential effects on friction and abrasion of sliding contacts lubricated by aqueous solutions
Surface potential effects on friction and abrasion of sliding contacts lubricated by aqueous solutions
This study has investigated the relationship between applied interfacial electrical potentials and friction
and abrasion for steel/steel contacts in alkaline aqueous-based solutions. The potential at a steel-aqueous
lubricated surface is important since it determines a number of important surface properties which
influence the overall friction and resistance to abrasion. The experimental approach used a pin-on-disc
rig incorporating potentiostatic control of the disc between ?1.0 and +1.0V overpotential.
Tests employed a load of 50N at a sliding speed of 0.03ms?1. EN 24 grade steel, equivalent to AISI
4340, was used as the material for the pin and disc. Tests were conducted in electrolyte that contained
electroactive species, namely octanoate ions, which could be “switched on” to the surface. Coefficient
of friction measurements were carried out throughout testing and later linked to potential or current
density behaviour to assess the mechanical and electrochemical interactions and its effect on wear and
friction. The effects of lubricity of the adsorbed layers are discussed and used to explain the performance.
0043-1648
1978-1986
Ismail, M.N.F
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Harvey, T.J
3b94322b-18da-4de8-b1af-56d202677e04
Wharton, J.A
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Wood, R.J.K
d9523d31-41a8-459a-8831-70e29ffe8a73
Humprheys, A
4c51986b-3e78-4a90-a5e8-1454d3385cda
Ismail, M.N.F
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Harvey, T.J
3b94322b-18da-4de8-b1af-56d202677e04
Wharton, J.A
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Wood, R.J.K
d9523d31-41a8-459a-8831-70e29ffe8a73
Humprheys, A
4c51986b-3e78-4a90-a5e8-1454d3385cda

Ismail, M.N.F, Harvey, T.J, Wharton, J.A, Wood, R.J.K and Humprheys, A (2009) Surface potential effects on friction and abrasion of sliding contacts lubricated by aqueous solutions. Wear, 267 (11), 1978-1986.

Record type: Article

Abstract

This study has investigated the relationship between applied interfacial electrical potentials and friction
and abrasion for steel/steel contacts in alkaline aqueous-based solutions. The potential at a steel-aqueous
lubricated surface is important since it determines a number of important surface properties which
influence the overall friction and resistance to abrasion. The experimental approach used a pin-on-disc
rig incorporating potentiostatic control of the disc between ?1.0 and +1.0V overpotential.
Tests employed a load of 50N at a sliding speed of 0.03ms?1. EN 24 grade steel, equivalent to AISI
4340, was used as the material for the pin and disc. Tests were conducted in electrolyte that contained
electroactive species, namely octanoate ions, which could be “switched on” to the surface. Coefficient
of friction measurements were carried out throughout testing and later linked to potential or current
density behaviour to assess the mechanical and electrochemical interactions and its effect on wear and
friction. The effects of lubricity of the adsorbed layers are discussed and used to explain the performance.

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More information

Published date: 29 October 2009
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 149557
URI: https://eprints.soton.ac.uk/id/eprint/149557
ISSN: 0043-1648
PURE UUID: 108089e5-4f9e-4c6a-86db-b60623ad8dbe
ORCID for J.A Wharton: ORCID iD orcid.org/0000-0002-3439-017X
ORCID for R.J.K Wood: ORCID iD orcid.org/0000-0003-0681-9239

Catalogue record

Date deposited: 30 Apr 2010 13:18
Last modified: 06 Jun 2018 13:06

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Contributors

Author: M.N.F Ismail
Author: T.J Harvey
Author: J.A Wharton ORCID iD
Author: R.J.K Wood ORCID iD
Author: A Humprheys

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