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January 18, 2026Journal of Biomedical Materials Research Part B Applied BiomaterialsOpen Access

In Vivo Corrosion of Acetabular Modular Tapers Reduces Local Corrosion Resistance: Near‐Field Electrochemical Impedance Spectroscopy as an Indicator of the Type and Severity of Corrosion in Retrieved Hip Implants

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Authors

ASAarti A. ShenoyJGJeremy L. Gilbert

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Overview

Assesses corrosion types in retrieved hip implants using electrochemical impedance spectroscopy, indicating corrosion severity.

Key Points

  • To evaluate different types of corrosion modes in retrieved acetabular liners using near-field electrochemical impedance spectroscopy (nfEIS).
  • Utilized nfEIS to measure local impedance in modular taper regions of retrieved hip implants.
  • Correlated impedance responses with visually identified corrosion types and severities.
  • Applied equivalent circuit models to describe impedance behavior.
  • Compared different corrosion types by analyzing polarization resistance.
  • nfEIS successfully identified unique impedance responses for various corrosion types.
  • Intergranular corrosion showed lower polarization resistance compared to phase boundary corrosion.
  • Higher polarization resistance indicated greater corrosion resistance, correlating with surface integrity.

Cite This Study

Shenoy et al. (2026) studied this question.

synapsesocial.com/papers/696c7835eb60fb80d1396689https://doi.org/10.1002/jbmb.70033
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