The Corrosion Resistance of Composite Arch Wire Laser-Welded By NiTi Shape Memory Alloy and Stainless Steel Wires with Cu Interlayer in Artificial Saliva with Protein

The corrosion resistance of laser-welded composite arch wire (CoAW) with Cu interlayer between NiTi shape memory alloy and stainless steel wire in artificial saliva with different acidities and loads was studied. It was found that both the solution pH and the stress had a significant influence on the corrosion behaviors of the CoAW samples. Decreasing the solution pH or increasing the loading stress caused the increase of Cu release and weight loss. The corroded morphology formed on the surfaces of the CoAW was the consequence under the combined effect of corrosion and stress.

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Microstructural and corrosion resistance characterisation of NiTi shape memory alloy modified at low-temperature plasma with carbon coatings produced via RFCVD and IBAD methods

Corrosion Engineering Science and Technology ◽

10.1080/1478422x.2019.1656368 ◽

2019 ◽

Vol 54 (8) ◽

pp. 673-677

Author(s):

Justyna Witkowska ◽

Janusz Kamiński ◽

Tomasz Płociński ◽

Bogusław Rajchel ◽

Tomasz Borowski ◽

...

Keyword(s):

Corrosion Resistance ◽

Low Temperature ◽

Shape Memory Alloy ◽

Shape Memory ◽

Niti Shape Memory Alloy ◽

Low Temperature Plasma ◽

Temperature Plasma ◽

Carbon Coatings

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Corrosion Behavior of the Transient Liquid Phase Diffusion Bonding Joint of TiNi Shape Memory Alloy and Stainless Steel in Hanks' Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.739 ◽

2013 ◽

Vol 750-752 ◽

pp. 739-742

Author(s):

Ying Ling Wang ◽

Qiu Zhi Gao ◽

Gui Fang Sun ◽

Jie Ye

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Liquid Phase ◽

Shape Memory Alloy ◽

Shape Memory ◽

Corrosion Behavior ◽

Pitting Corrosion ◽

Diffusion Bonding ◽

Transient Liquid Phase ◽

Phase Diffusion

The transient liquid phase diffusion bonding (TLP-DB) was employed to join TiNi shape memory alloy (SMA) and stainless steel (SS) with an interlayer metal of Ag-Cu eutectic metal foil.The corrosion behavior of the TLP-DB joint in Hanks solution at 37°C was investigated by electrochemical methods.The results show that the corrosion resistance of the joint is comparable to, but lower than that of base metals during the early anodic polarization, and the corrosion rate of the joint is between that of TiNi SMA and SS in the transpassive region at high potentials. The corrosion resistance of the specimens in Hanks' solution is associated with the surface quality, mircotructure and the intermetallics. Both TiNi SMA and SS display the characteristics of localized corrosion with a little pitting corrosion, while the joints mainly show the characteristics of pitting corrosion concentrated on the enrichment Cu phases.

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Corrosion Kinetics of Laser Treated NiTi Shape Memory Alloy Biomaterials

MRS Proceedings ◽

10.1557/proc-459-477 ◽

1996 ◽

Vol 459 ◽

Cited By ~ 4

Author(s):

F. Villermaux ◽

I. Nakatsugawa ◽

M. Tabrizian ◽

D. L. Piron ◽

M. Meunier ◽

...

Keyword(s):

Corrosion Resistance ◽

Shape Memory Alloy ◽

Shape Memory ◽

Laser Treatment ◽

Niti Alloy ◽

Niti Shape Memory Alloy ◽

Surgical Implants ◽

Hank’S Solution ◽

Kinetics Of ◽

Human Fluids

ABSTRACTNiTi shape memory alloy presents interesting mechanical properties as surgical implants. However, due to its high amount of Ni which may dissolve and release toxic ions in human fluids, the medical use of this material is a great concern. We have developed a laser treatment which modifies the oxide layer and enhances uniform and localised corrosion resistance of NiTi alloy.In this paper we further analysed the effect of this treatment with potentiostatic and AC impedance measurements in physiological Hank's solution. We conclude that the laser treatment creates a stable passive film which results in improved corrosion resistance of this alloy.

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