Abrasive size and concentration effects on the tribo-corrosion of cast CoCrMo alloy in simulated body fluids

D. Sun, J.A. Wharton, R.J.K. Wood

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Some retrieved CoCrMo hip implants have shown that abrasive wear is one of the possible wear mechanisms invoked within such joints. To date, little work has focused on the third body abrasion of CoCrMo and therefore there is a general lack of understanding of the effect of abrasive size and volume concentration on the tribo-corrosion performance of the CoCrMo alloys. The present work assessed the tribo-corrosion behaviour of cast CoCrMo (F-75) under various abrasion-corrosion conditions by using a modified microabrasion tester incorporating a three-electrode electrochemical cell. The effects of reduced abrasive size/hardness and volume concentration, as well as the role of proteins on the tribo-corrosion performance of the cast CoCrMo alloy were addressed. The correlation between electrochemical and mechanical processes for different abrasion-corrosion test conditions has been discussed in detail. Results show that the reduction in abrasive size and volume concentration can significantly affect the abrasion-corrosion wear mechanisms and the wear-induced corrosion response of the material. The finding of this study implies that the smaller/softer third body particles generated in vivo could also result in significant wear-induced corrosion and therefore potential metal ion release, which could be potentially detrimental to both the patient health and the life span of the implants.
Original languageEnglish
Pages (from-to)1595-1604
Number of pages10
JournalTribology International
Volume42
Issue number11-12
DOIs
Publication statusPublished - 01 Dec 2009
Externally publishedYes

Fingerprint Dive into the research topics of 'Abrasive size and concentration effects on the tribo-corrosion of cast CoCrMo alloy in simulated body fluids'. Together they form a unique fingerprint.

Cite this