Corrosion of Pure Titanium Sternal Wire

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Presentation transcript:

Corrosion of Pure Titanium Sternal Wire Yasuko Tomizawa, MD, PhD, Takao Hanawa, PhD The Annals of Thoracic Surgery Volume 84, Issue 3, Pages 1012-1014 (September 2007) DOI: 10.1016/j.athoracsur.2007.04.049 Copyright © 2007 The Society of Thoracic Surgeons Terms and Conditions

Fig 1 Examinations of titanium sternal wire. (A) Scanning electron microscopy of an explanted titanium sternal. Most of the surface is seriously corroded at the grain boundary. (B) Higher magnification of figure part A. Scratches along the direction of drawing (double-headed black arrow indicates drawing direction on the manufacturing process of the titanium wire) are found on most grains and small crevices, and slip lines (white arrowheads) formed during plastic deformation are also observed on the grains. (C) The surface of an unused titanium wire from the same company shows scratches from drawing (double-headed black arrow indicates drawing direction). (D) Energy dispersive spectroscopy identifies titanium as the only component of the explanted wire with grade 2 purity. (E) Polarization curve shows that the explanted wire maintains satisfactory corrosion resistance similar to commercially pure titanium. (E/V vs. SCE = potential voltage (E) versus saturated calomel electrode.) The Annals of Thoracic Surgery 2007 84, 1012-1014DOI: (10.1016/j.athoracsur.2007.04.049) Copyright © 2007 The Society of Thoracic Surgeons Terms and Conditions