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  4. Assessment of in-vivo corrosion of Ti and CoCrMo joint implants by electrochemical measurements in human synovial liquids
 
research article

Assessment of in-vivo corrosion of Ti and CoCrMo joint implants by electrochemical measurements in human synovial liquids

Bao, Yueyue  
•
Munoz, Anna Igual
•
Jolles, Brigitte M.
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January 3, 2024
Electrochimica Acta

Understanding the corrosion behavior of biomedical materials in the human body is an essential step for the development of improved materials and clinical procedures in arthroplasty. In this work, the corrosion behavior of Ti and CoCrMo alloys in human synovial fluids directly extracted from patients was investigated through an electrochemical experimental protocol, including open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. The results show that the corrosion behavior of both materials largely depends on patients. The obtained corrosion rates of both materials correspond well to the metal ion release rate detected in patients with joint implants revealing the adequateness of the electrochemical experimental protocol for quantifying in-vivo corrosion of biomedical implants. Based on the results, no significant risk of galvanic corrosion of Ti/CoCrMo coupling is anticipated. The rates of wearaccelerated corrosion (one of the main degradation mechanisms of metallic artificial hip joints) were theoretically extracted from the present electrochemical measurements using an established tribocorrosion model. Those material loss rates are patient-dependent and can be up to two orders of magnitude higher than the static corrosion rates, indicating that the nature of the patient can critically affect the degradation rate of the joint implant.

  • Details
  • Metrics
Type
research article
DOI
10.1016/j.electacta.2023.143708
Web of Science ID

WOS:001155926800001

Author(s)
Bao, Yueyue  
Munoz, Anna Igual
Jolles, Brigitte M.
Mischler, Stefano  
Date Issued

2024-01-03

Publisher

Pergamon-Elsevier Science Ltd

Published in
Electrochimica Acta
Volume

476

Article Number

143708

Subjects

Physical Sciences

•

Human Synovial Fluids

•

Corrosion

•

Ti

•

Cocrmo

•

Galvanic Corrosion

•

Tribocorrosion

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
TIC
FunderGrant Number

Founds National Suisse

200021-184851/1

Available on Infoscience
February 23, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/205472
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