Microstructure and corrosion behavior of Ti-10Mo-6Zr-4Sn-3 Nb (Ti-B12) alloys as biomedical material in lactic acid-containing Hank's solution

被引：0
作者：
Wen, Xiangmei [1 ]
Hao, Shuai [2 ]
Liu, Suwan [1 ]
Cheng, Jun [3 ]
He, Yixuan [4 ]
Chen, Liang-Yu [2 ]
机构：
[1] Jiangsu Univ, Affiliated Peoples Hosp, Lab Ctr, Zhenjiang 212002, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Technol, Zhenjiang 212003, Jiangsu, Peoples R China
[3] Northwest Inst Nonferrous Met Res, Shaanxi Key Lab Biomed Met Mat, Xian 710016, Shaanxi, Peoples R China
[4] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2025年 / 20卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Ti alloys; Electrochemical corrosion; Passive film; Lactic acid; PASSIVE FILM; TITANIUM; RESISTANCE; GROWTH; PH;
D O I：
10.1016/j.ijoes.2025.100974
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Due to the growing interest in Ti and its alloys in the biomedical field, Ti-10Mo-6Zr-4Sn-3 Nb (Ti-B12) alloys have promising potential for orthopedic applications. However, although much work is related to the microstructures and mechanical properties of Ti-B12 alloys, their corrosion behavior, especially in the solution containing lactic acid, is still unclear. This work investigated the microstructures and electrochemical corrosion behavior of Ti-B12 alloys in Hank's solution with varying lactic acid concentrations. As-cast, deformed, and annealed Ti-B12 alloys were used as the samples. The results show that lactic acid plays a detrimental role in the corrosion resistance of the alloys. When the lactic acid concentration of Hank's solution is 0.075 wt% (pH = 3), the Ti-B12 alloys exhibit the highest corrosion current densities of 0.055 mu A center dot cm- 2, 0.078 mu A center dot cm- 2, and 0.098 mu A center dot cm-2, for the annealed, as-cast and deformed samples, respectively. Correspondingly, in such a situation, the impedances of the passive films formed after open circuit potential are 1.46 MS2 center dot cm2, 1.28 MS2 center dot cm2, and 0.95 MS2 center dot cm2, which is about two-thirds of those in the Hank's solution with pH of 7. The lactic acid dissolves the outer layer of the passive film, resulting in an increased density of oxygen vacancies. The annealed sample exhibits refined grains in the microstructure, crucial for enhancing corrosion resistance. The as-cast samples display coarser grains. The grains are broken and elongated in the rolling direction in the deformed sample, leading to inferior performance in corrosive environments. This research provides critical insights into the potential applications of Ti-B12 alloys in biomedical environments.
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页数：17
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