Abstract
A sensitive electrochemical technique has been used to examine the passive state of titanium-based materials in Ringer's physiological solution. At ambient temperature, the alloy Ti-6Al-4V shows transient microscopic breakdown of the passive state induced by the presence of chloride ions, and enhanced by increased acidity. These breakdown events involve highly localized depassivation of the passive surface followed by repassivation. Under similar experimental conditions no breakdown of passive titanium was detected.
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Souto, B.M., Burstein, G.T. A preliminary investigation into the microscopic depassivation of passive titanium implant materials in vitro . J Mater Sci: Mater Med 7, 337–343 (1996). https://doi.org/10.1007/BF00154545
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DOI: https://doi.org/10.1007/BF00154545