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Effect of Surface Treatment on Surface Characteristics and Biocompatibility of AISI 316L Stainless Steel

[+] Author Affiliations
Guna Selvaduray

San Jose State University, San Jose, CA

Steve Trigwell

NASA Kennedy Space Center, Kennedy Space Center, FL

Paper No. NANOBIO2006-18031, pp. 27-28; 2 pages
doi:10.1115/NANOBIO2006-18031
From:
  • ASME 2006 Frontiers in Biomedical Devices Conference
  • ASME 2006 Frontiers in Biomedical Devices Conference
  • Irvine, California, USA, June 8 – 9, 2006
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4763-2 | eISBN: 0-7918-3781-5
  • Copyright © 2006 by ASME

abstract

Surface characteristics are essential in determining the biocompatibility of medical implants. Surface treatments such as mechanical polishing, electropolishing, passivation and plastic strain of AISI 316L stainless steel was found to affect the critical surface tension, with the combined electropolishing and passivation treatment resulting in the most desirable critical surface tension for biocompatibility. AES and XPS analysis showed that electropolishing results in changing the surface chemical composition significantly. There is significant Cr enrichment on the surface, compared to the bulk. The surface Cr and Fe exist as a combination of oxides and hydroxides.

Copyright © 2006 by ASME

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