TY - CHAP
T1 - Evaluation of the Physicochemical Properties of Passive Layers Produced on NiTi Alloys for Use in the Cardiovascular System
AU - Taratuta, Anna
AU - Paszenda, Zbigniew
AU - Basiaga, Marcin
AU - Antonowicz, Magdalena
AU - Walke, Witold
AU - Nakonieczny, Damian
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2023
Y1 - 2023
N2 - Implants made of NiTi alloy for use in the bloodstream should be characterized by good biocompatibility and hemocompatibility, understood as not exerting a harmful effect on blood morphotic components, and prevention of clot formation. Due to the small size of the implants, electropolishing was used. Next, four methods of NiTi alloy passivation were applied: in boiling water, in boiling H2O2, in the autoclave, and in air at temp. 450 ∘ C. Potentiodynamic impedance, EIS, and wettability tests were used to assess the surface. The results of corrosion resistance tests in the environment of artificial plasma show that there are no significant differences in the methods of passivation compared to electropolishing. Therefore, it can be concluded that already during the electropolishing process a passive layer with very good biocompatibility is produced spontaneously and the use of additional passivation methods does not improve but also does not deteriorate the properties tested.
AB - Implants made of NiTi alloy for use in the bloodstream should be characterized by good biocompatibility and hemocompatibility, understood as not exerting a harmful effect on blood morphotic components, and prevention of clot formation. Due to the small size of the implants, electropolishing was used. Next, four methods of NiTi alloy passivation were applied: in boiling water, in boiling H2O2, in the autoclave, and in air at temp. 450 ∘ C. Potentiodynamic impedance, EIS, and wettability tests were used to assess the surface. The results of corrosion resistance tests in the environment of artificial plasma show that there are no significant differences in the methods of passivation compared to electropolishing. Therefore, it can be concluded that already during the electropolishing process a passive layer with very good biocompatibility is produced spontaneously and the use of additional passivation methods does not improve but also does not deteriorate the properties tested.
KW - Cardiovascular system
KW - NiTi alloys
KW - Passivation
KW - Surface modification
UR - https://www.scopus.com/pages/publications/85131813620
U2 - 10.1007/978-3-030-99112-8_22
DO - 10.1007/978-3-030-99112-8_22
M3 - Chapter
AN - SCOPUS:85131813620
T3 - Lecture Notes in Networks and Systems
SP - 217
EP - 224
BT - Lecture Notes in Networks and Systems
PB - Springer Science and Business Media Deutschland GmbH
ER -