The effect of hypochlorous acid on the tribocorrosion of CoCrMo/Ti‐6Al‐4V bearing couples

Mechanically assisted corrosion (MAC) of metallic orthopedic alloys is a consequence of the use of modular devices where opposing metal surfaces are tightly mated and loaded at the taper junction. MAC processes are affected by material surface characteristics and local solution chemistry. During inf...

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Bibliographic Details
Published in:Journal of biomedical materials research. Part A 2021-12, Vol.109 (12), p.2536-2544
Main Authors: Kubacki, Gregory W., Gilbert, Jeremy L.
Format: Article
Language:English
Subjects:
Abrasion
Alloys - chemistry
arthroplasty
Bone and Bones
Buffers (chemistry)
Corrosion
Couples
Fretting
Hip Prosthesis
Hypochlorous acid
Hypochlorous Acid - chemistry
Immune system
Inflammation
Metal surfaces
metal‐on‐metal devices
Modular equipment
Open circuit voltage
Orthopedics
Oxidation-Reduction
Oxide coatings
Powders
Prostheses and Implants
Prosthesis Design
Reactive oxygen species
Regrowth
Surface Properties
Titanium - chemistry
Titanium base alloys
total joint
tribocorrosion
Vitallium - chemistry
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Summary:Mechanically assisted corrosion (MAC) of metallic orthopedic alloys is a consequence of the use of modular devices where opposing metal surfaces are tightly mated and loaded at the taper junction. MAC processes are affected by material surface characteristics and local solution chemistry. During inflammation, active immune cells may generate reactive oxygen species (such as hypochlorous acid [HOCl]) adjacent to surfaces undergoing micromotion, which may affect the tribocorrosion behavior of an implanted device. This study investigated the fretting current response of CoCrMo/Ti‐6Al‐4 V couples in a pin‐on‐disk apparatus utilizing HOCl solutions as a proxy for a severe inflammatory environment. Testing in 1 and 5 mM HOCl solutions were shown to generate a threefold and fivefold increase (p 
ISSN:1549-3296
1552-4965
DOI:10.1002/jbm.a.37248