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The Effect of Exposure to Simulated Body Fluids on Breakdown Potentials

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Abstract

Current methods to evaluate the corrosion resistance of small medical implants are typically based on short-term in vitro tests. While the duration of these tests is kept to a minimum to make it feasible to evaluate a large number of samples in a reasonable time, these methods do not account for the long-term changes that can occur in the oxides of metals exposed to biological fluids. Given other electrochemical changes to these materials with time in solution, it is a reasonable question to consider whether breakdown potentials are a fundamental parameter of a material and surface condition. Data on 316L and nitinol wire samples, and nitinol stents, show that breakdown potentials increase with time in solution up to 28 days. The difference between the breakdown potential and rest potentials either increased or exhibited no change.

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Authors and Affiliations

  1. W.L. Gore & Associates, 501 Vieve’s Way, Elkton, MD, 21921, USA

    Clifford P. Warner

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  1. Clifford P. Warner
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Correspondence to Clifford P. Warner.

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This article is an invited paper selected from presentations at Shape Memory and Superelastic Technologies 2008, held September 21-25, 2008, in Stresa, Italy, and has been expanded from the original presentation.

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Warner, C.P. The Effect of Exposure to Simulated Body Fluids on Breakdown Potentials. J. of Materi Eng and Perform 18, 754–759 (2009). https://doi.org/10.1007/s11665-009-9404-z

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  • DOI: https://doi.org/10.1007/s11665-009-9404-z

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