The University of Southampton
University of Southampton Institutional Repository

Micro-abrasion-corrosion of a CoCrMo alloy in simulated artificial hip joint environments

Micro-abrasion-corrosion of a CoCrMo alloy in simulated artificial hip joint environments
Micro-abrasion-corrosion of a CoCrMo alloy in simulated artificial hip joint environments
This study aims to investigate the synergistic effects of corrosion and wear of artificial human joints made from a surgical grade cast F-75 cobalt–chromium–molybdenum (CoCrMo) alloy. Both electrochemical and gravimetric measurements have been used to determine the performance of CoCrMo samples in static environments and under predominantly three-body abrasive wear conditions using the micro-abrasion test method. Electrochemical measurements are presented from embedded corrosion cells within a micro-abrasion rig. Micro-abrasion–corrosion has been studied using an aggressive abrasive slurry (SiC/Ringer's) to identify depassivation and repassivation processes. These initial conditions are an attempt to simulate worst-case scenarios where wear, cement or bone debris are entrained into the contact. The in situ wear-corrosion measurements have been used to identify the implications of wear and corrosion on both the implant and tentative implications for the patient over the long term. Results show strong synergistic effects occur ranging from negative to positive (i.e. beneficial to accelerated surface removal rates). The synergistic levels appear to be dependent on the integrity of the passive films and the repassivation kinetics. Corrosion potentials are presented which corroborate depassivation within the scar.
artificial implants, CoCrMo alloy, micro-abrasion, corrosion, wear debris simulation
0043-1648
898-909
Sinnett-Jones, P.E.
5fe4f09b-5e4e-4a02-a335-c34e2a776345
Wharton, J.A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Sinnett-Jones, P.E.
5fe4f09b-5e4e-4a02-a335-c34e2a776345
Wharton, J.A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73

Sinnett-Jones, P.E., Wharton, J.A. and Wood, R.J.K. (2005) Micro-abrasion-corrosion of a CoCrMo alloy in simulated artificial hip joint environments. Wear, 259 (7-12), 898-909. (doi:10.1016/j.wear.2005.02.045).

Record type: Article

Abstract

This study aims to investigate the synergistic effects of corrosion and wear of artificial human joints made from a surgical grade cast F-75 cobalt–chromium–molybdenum (CoCrMo) alloy. Both electrochemical and gravimetric measurements have been used to determine the performance of CoCrMo samples in static environments and under predominantly three-body abrasive wear conditions using the micro-abrasion test method. Electrochemical measurements are presented from embedded corrosion cells within a micro-abrasion rig. Micro-abrasion–corrosion has been studied using an aggressive abrasive slurry (SiC/Ringer's) to identify depassivation and repassivation processes. These initial conditions are an attempt to simulate worst-case scenarios where wear, cement or bone debris are entrained into the contact. The in situ wear-corrosion measurements have been used to identify the implications of wear and corrosion on both the implant and tentative implications for the patient over the long term. Results show strong synergistic effects occur ranging from negative to positive (i.e. beneficial to accelerated surface removal rates). The synergistic levels appear to be dependent on the integrity of the passive films and the repassivation kinetics. Corrosion potentials are presented which corroborate depassivation within the scar.

This record has no associated files available for download.

More information

Published date: 2005
Additional Information: 15th International Conference on Wear of Materials
Keywords: artificial implants, CoCrMo alloy, micro-abrasion, corrosion, wear debris simulation

Identifiers

Local EPrints ID: 23325
URI: http://eprints.soton.ac.uk/id/eprint/23325
ISSN: 0043-1648
PURE UUID: 71c727e3-589d-4105-bd62-690d6fa6ae46
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: 16 Mar 2006
Last modified: 16 Mar 2024 02:59

Export record

Altmetrics

Contributors

Author: P.E. Sinnett-Jones
Author: J.A. Wharton ORCID iD
Author: R.J.K. Wood ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×