Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

Sign In to gain access to subscriptions and/or personal tools.
Journal of Biomaterials Applications
This Article
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
0885328206056378v1
21/1/93    most recent
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via Web of Science (1)
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Silva, R. A.
Right arrow Articles by Rondot, B.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Silva, R. A.
Right arrow Articles by Rondot, B.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Effect of Surface Treatments on Anodic Oxide Film Growth and Electrochemical Properties of Tantalum used for Biomedical Applications

R. A. Silva

Instituto Superior de Engenharia do Porto/ISEP-CIEA, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal; Instituto de Engenharia Biomédica/INEB, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal ras{at}isep.ipp.pt

I. P. Silva

Instituto Superior de Engenharia do Porto/ISEP-CIEA, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal

B. Rondot

CECM/CNRS, 15 Rue Georges Urbain 94407 Vitry-sur-Seine Cedex, France

Self-expandable nitinol (nickel-titanium) alloys and 316L stainless steel are the most commonly used materials in the production of coronary stents. However, tantalum (Ta) has already been used to make stents for endovascular surgery and may constitute an alternative to other materials because of its better electrochemical performance, namely its higher corrosion resistance, as well as its radio-opacity. The characterization of wet polished, chemically polished, wet polished anodized, and chemically polished anodized Ta electrodes has been performed in a 0.15 M NaCl solution (simulated body fluid) using Ucorr=f(t) measurements, anodic polarizations, capacity measurements, anodic oxidations, and atomic force microscopy (AFM) imaging. Anodic polarization curves have shown that the abnormal current density peak with a maximum value around 1.65 V (critical applied potential, Uc) disappeared for the anodized electrodes indicating a probable relationship between the surface states and the film growth. These results are confirmed by capacity measurements. The behavior of wet polished and chemically polished electrodes during anodic oxidations seemingly indicated that for these particular treatments the film growth is different. The AFM images and roughness measurements have shown that chemical polishing produced smoother electrodes, a fact probably related to the differences in film growth.

Key Words: AFM • anodic films • coronary stents • polarization • tantalum

This version was published on July 1, 2006

Journal of Biomaterials Applications, Vol. 21, No. 1, 93-103 (2006)
DOI: 10.1177/0885328206056378
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?