Electropolishing and passivation of NiTi shape memory alloy

Wojciech Simka; Marcin Kaczmarek; Aleksandra Baron-Wiecheć; Ginter Nawrat; Jan Marciniak; Jerzy Zak

doi:10.1016/j.electacta.2009.11.097

Electropolishing and passivation of NiTi shape memory alloy

Wojciech Simka^*, Marcin Kaczmarek, Aleksandra Baron-Wiecheć, Ginter Nawrat, Jan Marciniak, Jerzy Zak

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

93 Scopus citations

Abstract

Electropolishing of NiTi alloy has been investigated. The influence of polishing bath composition and the operating conditions instead of the conditions of the process on the quality of the surface, evaluated by AFM and SEM methods, was established. Morphologically uniform surfaces were obtained only in the case of solutions containing hydrofluoric and sulfuric acids. Electropolished samples were sterilized and thermally passivated, then their corrosion resistance was measured in Tyrode's physiological solution. It was established that already after the electropolishing the corrosion resistance of NiTi alloy increases due to the spontaneously formed TiO₂ layer. The increase of the thickness of the layer during sterilization and thermal passivation causes further increase in the corrosion resistance.

Original language	English
Pages (from-to)	2437-2441
Number of pages	5
Journal	Electrochimica Acta
Volume	55
Issue number	7
DOIs	https://doi.org/10.1016/j.electacta.2009.11.097
State	Published - 28 Feb 2010
Externally published	Yes

Keywords

Biomaterials
Corrosion
Electrochemical impedance spectroscopy
Electropolishing
NiTi
Passivation

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10.1016/j.electacta.2009.11.097

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title = "Electropolishing and passivation of NiTi shape memory alloy",

abstract = "Electropolishing of NiTi alloy has been investigated. The influence of polishing bath composition and the operating conditions instead of the conditions of the process on the quality of the surface, evaluated by AFM and SEM methods, was established. Morphologically uniform surfaces were obtained only in the case of solutions containing hydrofluoric and sulfuric acids. Electropolished samples were sterilized and thermally passivated, then their corrosion resistance was measured in Tyrode's physiological solution. It was established that already after the electropolishing the corrosion resistance of NiTi alloy increases due to the spontaneously formed TiO2 layer. The increase of the thickness of the layer during sterilization and thermal passivation causes further increase in the corrosion resistance.",

keywords = "Biomaterials, Corrosion, Electrochemical impedance spectroscopy, Electropolishing, NiTi, Passivation",

author = "Wojciech Simka and Marcin Kaczmarek and Aleksandra Baron-Wieche{\'c} and Ginter Nawrat and Jan Marciniak and Jerzy Zak",

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T1 - Electropolishing and passivation of NiTi shape memory alloy

AU - Simka, Wojciech

AU - Kaczmarek, Marcin

AU - Baron-Wiecheć, Aleksandra

AU - Nawrat, Ginter

AU - Marciniak, Jan

AU - Zak, Jerzy

PY - 2010/2/28

Y1 - 2010/2/28

N2 - Electropolishing of NiTi alloy has been investigated. The influence of polishing bath composition and the operating conditions instead of the conditions of the process on the quality of the surface, evaluated by AFM and SEM methods, was established. Morphologically uniform surfaces were obtained only in the case of solutions containing hydrofluoric and sulfuric acids. Electropolished samples were sterilized and thermally passivated, then their corrosion resistance was measured in Tyrode's physiological solution. It was established that already after the electropolishing the corrosion resistance of NiTi alloy increases due to the spontaneously formed TiO2 layer. The increase of the thickness of the layer during sterilization and thermal passivation causes further increase in the corrosion resistance.

AB - Electropolishing of NiTi alloy has been investigated. The influence of polishing bath composition and the operating conditions instead of the conditions of the process on the quality of the surface, evaluated by AFM and SEM methods, was established. Morphologically uniform surfaces were obtained only in the case of solutions containing hydrofluoric and sulfuric acids. Electropolished samples were sterilized and thermally passivated, then their corrosion resistance was measured in Tyrode's physiological solution. It was established that already after the electropolishing the corrosion resistance of NiTi alloy increases due to the spontaneously formed TiO2 layer. The increase of the thickness of the layer during sterilization and thermal passivation causes further increase in the corrosion resistance.

KW - Biomaterials

KW - Corrosion

KW - Electrochemical impedance spectroscopy

KW - Electropolishing

KW - NiTi

KW - Passivation

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U2 - 10.1016/j.electacta.2009.11.097

DO - 10.1016/j.electacta.2009.11.097

M3 - 文章

AN - SCOPUS:75949101062

SN - 0013-4686

VL - 55

SP - 2437

EP - 2441

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 7

ER -

Electropolishing and passivation of NiTi shape memory alloy

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Keywords

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