Influence of heat treatment on corrosion resistance of NiTi shape memory alloys in NaCl solution

被引：0
|
作者：
Li, Xinmei [1 ,2 ]
Suo, Shuai [2 ]
Xue, Tianxiang [1 ,2 ]
Li, Wen [2 ]
Bu, Yanjiang [2 ]
Wu, Dongting [3 ]
机构：
[1] State Grid Shandong Elect Power Res Inst, Jinan 250002, Shandong, Peoples R China
[2] Shandong Power Ind Boiler & Pressure Vessel Inspec, Jinan, Shandong, Peoples R China
[3] Shandong Univ, MOE Key Lab Mat Liquid Solid Struct Evolut & Proc, Jinan 250061, Shandong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2025年 / 20卷 / 04期
关键词：
NiTi Shape memory alloy; Corrosion resistance; Heat treatment; Electrochemical test; ELECTROCHEMICAL IMPEDANCE; MICROSTRUCTURE;
D O I：
10.1016/j.ijoes.2025.100949
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
This study conducts quenching heat treatment on hot-rolled Nickel-Titanium (NiTi) shape memory alloys, and explores effects of quenching heat treatment on microstructure and corrosion resistance of NiTi shape memory alloys through microstructure, cyclic tensile mechanical properties, polarization curves, electrochemical impedance spectroscopy, and Mott-Schottky tests. It reveals that quenching heat treatment refines the alloy's grain structure, enhances the uniformity of the microstructure, facilitates the diffusion and dissolution of Ti-C carbides, and optimizes the distribution of the alloy's chemical composition. While heat treatment may result in a reduction of the material's super-elasticity, it significantly enhances its corrosion resistance. It reduces the self-corrosion current density and corrosion rate, increases the charge transfer resistance, decreases the carrier concentration, and strengthens the stability of the passivation film. Consequently, quenching heat treatment proves to be an effective method for optimizing the performance of NiTi shape memory alloys and enhancing their corrosion resistance.
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页数：8
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