A link between the tribology and corrosive degradation of metal-on-metal THRs

作者：Beadling A R; Bryant M G; Dowson D; Neville A

来源：Tribology International, 2017, 113: 354-361.

DOI：10.1016/j.triboint.2017.01.028

• Metal-on-Metal
• Biotribocorrosion
• Total hip replacement

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 28 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 (hmi) over a cycle, which was shown to match closely to the measured anodic current in both shape and magnitude.

• 出版日期2017-9