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Microabrasion-corrosion of cast CoCrMo alloy in simulated body fluids

Sun, D., Wharton, J.A., Wood, R.J.K., Ma, L. and Rainforth, W.M. (2009) Microabrasion-corrosion of cast CoCrMo alloy in simulated body fluids Tribology International, 42, (1), pp. 99-110. (doi:10.1016/j.triboint.2008.05.005).

Record type: Article

Abstract

Wear and corrosion of metal-on-metal hip replacements results in wear debris and metal-ion release in vivo, which may subsequently cause pain and hypersensitivity for patients. Retrieved metal-on-metal hip replacements have revealed that two-body sliding wear and three-body abrasive wear are the predominant wear mechanisms. However, there is a lack of understanding of the combined effects of wear/corrosion, especially the effect of abrasion–corrosion.
This study investigates the sliding–corrosion and abrasion–corrosion performance of a cast CoCrMo alloy in simulated hip joint environments using a microabrasion rig integrated with an electrochemical cell. Tests have been conducted in 0.9% NaCl, phosphate buffered saline solution, 25% and 50% bovine serum solutions with 0 or 1 g cm–3 SiC at 37 °C. Experimental results reveal that under abrasion–corrosion test conditions, the presence of proteins increased the total specific wear rate. Conversely, electrochemical noise measurements indicated that the average anodic current levels were appreciably lower for the proteinaceous solutions when compared with the inorganic solutions. A severely deformed nanocrystalline layer was identified immediately below the worn surface for both proteinaceous and inorganic solutions. The layer is formed by a recrystallisation process and/or a strain-induced phase transformation that occurs during microabrasion–corrosion.

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More information

Published date: January 2009
Keywords: microabrasion, corrosion, cast, CoCrMo alloy, simulated body fluids, microabrasion-corrosion, abrasion-corrosion, CoCrMo, effects of, micron, sub-micron, cast CoCrMo, hip replacement, micro-abrasion–corrosion, size effect
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 64906
URI: http://eprints.soton.ac.uk/id/eprint/64906
ISSN: 0301-679X
PURE UUID: 920cc79e-b6ea-4d2e-8e3e-a5e7f5f080f1
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: 22 Jan 2009
Last modified: 17 Jul 2017 14:11

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Contributors

Author: D. Sun
Author: J.A. Wharton ORCID iD
Author: R.J.K. Wood ORCID iD
Author: L. Ma
Author: W.M. Rainforth

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