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Passive films on metallic biomaterials under simulated physiological conditions
Author(s) -
Pound B. G.
Publication year - 2014
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.34798
Subject(s) - materials science , corrosion , dielectric spectroscopy , metal , oxide , composite material , electrical impedance , nanotechnology , metallurgy , electrochemistry , electrode , chemistry , electrical engineering , engineering
The metallic materials used for implantable medical devices are predominantly stainless steels, Ti and its alloys, and Co‐Cr alloys. The corrosion resistance of each of these materials is associated with a passive oxide film on its surface. Since corrosion resistance is crucial to implant performance, considerable effort has been focused on understanding the nature of the passive film present under physiological conditions. Surface analytical techniques and electrochemical impedance spectroscopy have been used in a number of studies to investigate the passive film formed on metallic biomaterials in simulated physiological solutions. This review focuses on the surface characteristics of these materials with regard to composition, thickness, and impedance of the passive films. Of particular interest are changes in the films with surface treatment and the nature of the films developed over time in the simulated solutions. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 1595–1604, 2014.