TA2 钛合金表面纳米结晶对其耐腐蚀性的影响

IF 2.9 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Coatings Pub Date : 2024-09-02 DOI:10.3390/coatings14091114

Zhengyi Li, Yanzhao Wang, Jiangong Zhang, Yiwei Guo, Lei Wen

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引用次数: 0

摘要

本研究通过表面机械磨损处理实现了 TA2 钛合金的表面纳米处理。通过扫描电镜、电子显微镜、电化学阻抗谱和电位极化等手段研究了纳米晶层的微观结构和电化学性能，并探讨了钝化膜的成核机理。结果表明，通过表面机械研磨处理（SMAT），样品表面原有的粗大晶粒转变为随机取向的纳米晶体。在 3.5 重量%的氯化钠溶液中，表面纳米结晶的 TA2 钛合金的腐蚀电流密度（9.2 nA-cm-2）比未经处理的 TA2 钛合金（134.5 nA-cm-2）降低了两个数量级。SMAT 方法加速了向连续成核过渡的成核机制。

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The Influence of Surface Nanocrystallization of TA2 Titanium Alloy on Its Corrosion Resistance

In this study, the surface nano treatment of TA2 titanium alloy was realized by means of surface mechanical wear treatment. The microstructure and electrochemical properties of the nanocrystalline layer were investigated by SEM, TEM, Electrochemical Impedance Spectroscopy, and Potentiodynamic Polarization, while the nucleation mechanism of the passivation film was discussed. The results indicate that the original coarse grains on the sample’s surface are transformed into randomly oriented nanocrystals by surface mechanical attrition treatment (SMAT). The corrosion current density of the surface nanocrystallized TA2 titanium alloy (9.2 nA·cm−2) experienced a reduction of two orders of magnitude compared to untreated TA2 titanium alloy (134.5 nA·cm−2) in 3.5 wt.% NaCl solution. The SMAT methods accelerates nucleation mechanism transitioning to continuous nucleation.

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来源期刊

Coatings Materials Science-Surfaces, Coatings and Films

CiteScore

5.00

自引率

11.80%

发文量

1657

审稿时长

1.4 months

期刊介绍： Coatings is an international, peer-reviewed open access journal of coatings and surface engineering. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided. There are, in addition, unique features of this journal: * manuscripts regarding research proposals and research ideas will be particularly welcomed * electronic files or software regarding the full details of the calculation and experimental procedure - if unable to be published in a normal way - can be deposited as supplementary material