Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4985811 | Tribology International | 2017 | 14 Pages |
Abstract
The degradation of Metal-on-Metal (MoM) Total Hip Replacements (THRs) is a complex mix of tribological, corrosive phenomena and their synergistic processes. Previous links between the corrosion of these devices and their sliding conditions over a cycle have been observed in simulator studies instrumented with a three-electrode electrochemical cell. This study further quantifies that link; demonstrating clear repeating periodicity in the anodic current transients of a 28Â mm diameter MoM bearing under a standard ISO-14242 walking profile. A simplified 2D model and an expression of the Hamrock-Dowson equation was utilised to estimate the Theoretical Minimum Film Thickness (hmin) over a cycle, which was shown to match closely to the measured anodic current in both shape and magnitude.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
A.R. Beadling, M.G. Bryant, D. Dowson, A. Neville,