Work

Surface Roughness-Dependent Corrosion: Implications for Cochlear Implant Reliability

Year: 2024

Type: article

Abstract: The corrosion behavior of platinum electrodes in cochlear implant (CI) systems is a critical factor affecting their long-term functionality. This study investigated the influence of the surface roughness of the platinum electrodes on their corrosion behavior. The results of in vitro experiments indicate that higher surface roughness tends to accelerate corrosion by providing numerous initiation sites. Although the electrochemical measurements of platinum electrodes with different surface roughnesses showed only slight differences in terms of shifts in potentials and higher corrosion current densities, data from the literature suggests an enhanced charge capacity with rougher surfaces. These findings contribute to an understanding of the failure mechanisms of CIs and can ultimately help to improve the design and durability of CI systems.

Source: Current Directions in Biomedical Engineering

DOI: 10.1515/cdbme-2024-2022

Authors: Tatiana Blank, Sabine Behrens, Christian Klose, Hans Jürgen Maier

Institution: Leibniz University Hannover

Language: English

Topic: Hearing Loss and Rehabilitation

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: diamond

Funder: Deutsche Forschungsgemeinschaft

Award: TRR 298: Sicherheitsintegrierte und infektionsreaktive Implantate