Abstract:
:Chromium oxide coatings prepared by radiofrequency reactive magnetron sputtering on stainless steel substrates were exposed to Ringer's physiological solution and tested for their electrochemical corrosion stability using an open circuit potential measurement, potentiodynamic polarization, electrochemical impedance spectroscopy and Mott-Schottky analysis. The coatings were found to be predominantly Cr2O3, based on the observation of the dominance of [Formula: see text] and Eg symmetric modes in our Raman spectroscopic investigation and the Eu vibrational modes in our Fourier transform infrared spectroscopic measurements on the coatings. We investigated for the presence of chromium ions in Ringer's solution after all of the above electrochemical tests using atomic absorption spectroscopy, without finding a trace of chromium ions at the ppm level for coatings tested under open circuit and at the lower potentials implants are likely to experience in the human body. The coatings were further exposed to Ringer's solution for one month and tested for adhesion strength changes, and we found that they retained substantial adhesion to the substrates. We expect this finding to be significant for future orthopaedic implants where chromium ion release is still a major challenge.
journal_name
R Soc Open Scijournal_title
Royal Society open scienceauthors
Oje AM,Ogwu AAdoi
10.1098/rsos.170218subject
Has Abstractpub_date
2017-07-05 00:00:00pages
170218issue
7issn
2054-5703pii
rsos170218journal_volume
4pub_type
杂志文章abstract::Determining the tempo and mode of non-avian dinosaur extinction is one of the most contentious issues in palaeobiology. Extensive disagreements remain over whether their extinction was catastrophic and geologically instantaneous or the culmination of long-term evolutionary trends. These conflicts have arisen due to nu...
journal_title:Royal Society open science
pub_type: 杂志文章
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journal_title:Royal Society open science
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abstract::[This corrects the article DOI: 10.1098/rsos.181295.]. ...
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pub_type: 杂志文章,已发布勘误
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journal_title:Royal Society open science
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