Electrochemical Analysis of Fretting Corrosion at Taper-Trunnion Interface
Type of Submission
Poster
Keywords
Hip replacement, taper trunnion, trunnionosis, fretting corrosion
Abstract
One of the most prevalent issues regarding Metal on Metal (MOM) hip implants is fretting corrosion, a result of cyclic motion between the taper (female component) and the trunnion (male component). The metal ions that are released as a result of fretting corrosion can potentially have adverse effects on the surrounding tissue within the hip, leading to pain and premature replacement. The predominant methods for measuring fretting corrosion have been primarily qualitative; however, a quantitative method for measurement is possible through electrochemical analysis. This is a short-term test that is meant to provide quantitative results allowing different designs to be compared with regards to fretting corrosion generated. When the oxidation layer of a metal object is breached the half-cell potential of the object is changed, which produces a voltage difference. We can use this voltage difference as a way to quantify fretting-corrosion typically through a current measurement. We have conducted experiments in which this process has been mimicked, and the results for multiple materials and time durations have been produced. Based on the results of these experiments, we think electrochemical analysis is an accurate and efficient method for comparing fretting corrosion amounts between different taper-trunnion design configurations.
Faculty Sponsor or Advisor’s Name
Dr. T.L. Norman, Dr. T.K. Fehring
Campus Venue
Stevens Student Center
Location
Cedarville, OH
Start Date
4-1-2015 11:00 AM
End Date
4-1-2015 2:00 PM
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Electrochemical Analysis of Fretting Corrosion at Taper-Trunnion Interface
Cedarville, OH
One of the most prevalent issues regarding Metal on Metal (MOM) hip implants is fretting corrosion, a result of cyclic motion between the taper (female component) and the trunnion (male component). The metal ions that are released as a result of fretting corrosion can potentially have adverse effects on the surrounding tissue within the hip, leading to pain and premature replacement. The predominant methods for measuring fretting corrosion have been primarily qualitative; however, a quantitative method for measurement is possible through electrochemical analysis. This is a short-term test that is meant to provide quantitative results allowing different designs to be compared with regards to fretting corrosion generated. When the oxidation layer of a metal object is breached the half-cell potential of the object is changed, which produces a voltage difference. We can use this voltage difference as a way to quantify fretting-corrosion typically through a current measurement. We have conducted experiments in which this process has been mimicked, and the results for multiple materials and time durations have been produced. Based on the results of these experiments, we think electrochemical analysis is an accurate and efficient method for comparing fretting corrosion amounts between different taper-trunnion design configurations.
