TY - JOUR
T1 - Corrosion resistance of TiN coated biomedical nitinol under deformation
AU - Zhang, Deyuan
AU - Zeng, Weijun
AU - Zi, Zhenjun
AU - Chu, Paul K.
PY - 2009/6/1
Y1 - 2009/6/1
N2 - The corrosion resistance of nitinol with and without a titanium nitride coating is electrochemically investigated at 37 °C in artificial plasma. The electrochemical experiments show that the titanium nitride (TiN) coating can increase the stable potential from 0.95 to 1.5 V versus a saturated calomel electrode and reduce the corrosion current density from 0.20 to 0.10 mA/cm2. The valence of the dissolved titanium and nickel ions is plus two. At deformation less than 6%, no significant negative effects on the corrosion resistance of the TiN coated nitinol is observed. More deformation causes cracks in the TiN coatings and consequently, the corrosion resistance degrades slightly, but it is still better than that of the uncoated nitinol since no galvanic corrosion is observed from the broken areas. © 2008 Elsevier B.V. All rights reserved.
AB - The corrosion resistance of nitinol with and without a titanium nitride coating is electrochemically investigated at 37 °C in artificial plasma. The electrochemical experiments show that the titanium nitride (TiN) coating can increase the stable potential from 0.95 to 1.5 V versus a saturated calomel electrode and reduce the corrosion current density from 0.20 to 0.10 mA/cm2. The valence of the dissolved titanium and nickel ions is plus two. At deformation less than 6%, no significant negative effects on the corrosion resistance of the TiN coated nitinol is observed. More deformation causes cracks in the TiN coatings and consequently, the corrosion resistance degrades slightly, but it is still better than that of the uncoated nitinol since no galvanic corrosion is observed from the broken areas. © 2008 Elsevier B.V. All rights reserved.
KW - Corrosion resistance
KW - Nitinol
KW - Titanium nitride
UR - http://www.scopus.com/inward/record.url?scp=67349224709&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-67349224709&origin=recordpage
U2 - 10.1016/j.msec.2008.12.022
DO - 10.1016/j.msec.2008.12.022
M3 - RGC 21 - Publication in refereed journal
SN - 0928-4931
VL - 29
SP - 1599
EP - 1603
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
IS - 5
ER -