Arsenic contamination of coarse-grained and nanostructured nitinol surfaces induced by chemical treatment in hydrofluoric acid

D. M. Korotin, S. Bartkowski, E. Z. Kurmaev, C. Borchers, M. Müller, M. Neumann, D. V. Gunderov, R. Z. Valiev, S. O. Cholakh

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

XPS measurements of coarse-grained and nanostructured nitinol (Ni 50.2Ti49.8) before and after chemical treatment in hydrofluoric acid (40% HF, 1 min) are presented. The nanostructured state, providing the excellent mechanical properties of nitinol, is achieved by severe plastic deformation. The near-surface layers of nitinol were studied by XPS depth profiling. According to the obtained results, a chemical treatment in hydrofluoric acid reduces the thickness of the protective TiO2 oxide layer and induces a nickel release from the nitinol surface and an arsenic contamination, and can therefore not be recommended as conditioning to increase the roughness of NiTi-implants. A detailed evaluation of the resulting toxicological risks is given. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.

Original languageEnglish
Pages (from-to)1812-1816
Number of pages5
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume100 B
Issue number7
DOIs
Publication statusPublished - Oct 2012
Externally publishedYes

Keywords

  • arsenic contamination
  • nitinol
  • TiO
  • XPS

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