<strong>3D</strong>打印<strong>NiTi</strong>形状记忆合金在模拟不同口腔环境中电化学腐蚀行为研究

doi:10.11902/1005.4537.2023.141

中国腐蚀与防护学报

2023, Vol. 43

Issue (4): 781-786 CSTR: 32134.14.1005.4537.2023.141 DOI: 10.11902/1005.4537.2023.141

中国腐蚀与防护学会杰出青年成就奖论文专栏

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3D打印NiTi形状记忆合金在模拟不同口腔环境中电化学腐蚀行为研究

刘明¹(

), 王杰², 朱春晖³, 张延晓⁴

^1.西安交通大学材料科学与工程学院金属材料强度国家重点实验室西安 710049
^2.陕西周医生口腔医疗有限公司西安 710086
^3.西安交通大学口腔医院牙周科西安 710004
^4.无锡口腔医院口腔正畸科无锡 214000

Electrochemical Corrosion Behavior of 3D-printed NiTi Shape Memory Alloy in a Simulated Oral Environment

LIU Ming¹(

), WANG Jie², ZHU Chunhui³, ZHANG Yanxiao⁴

^1.State Key Laboratory of Strength of Metal Materials, School of Materials Science and Engineering, Xi 'an Jiaotong University, Xi 'an 710049, China
^2.Shaanxi Zhou Doctor Dental Medical Co., Ltd., Xi 'an 710086, China
^3.Department of Periodontology, College of Stomatology, Xi'an Jiaotong University, Xi 'an 710004, China
^4.Department of Orthodontic, Wuxi Hospital of Stomatology, Wuxi 214000, China

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摘要:

采用测量开路电位、极化曲线、电化学阻抗谱和Mott-Schottky方法研究了3D打印NiTi合金在不同人工唾液环境中的电化学腐蚀行为。结果表明，在纯人工唾液环境中，随着浸泡时间的延长，3D-NiTi合金的开路电位正移，合金的热力学稳定性提高，合金表现为典型的金属钝化极化特征，在人工唾液中可形成耐蚀稳定的钝化膜。添加可乐后，合金的热力学稳定性降低，极化曲线向左下方移动，自腐蚀电位负移，自腐蚀电流密度增大。添加1% NaF后，合金的热力学稳定性急剧降低，表现为活化腐蚀状态，钝化膜的缺陷数增加了3.7倍，F^-可极大地破坏钝化膜的完整性。

关键词 ： 3D-NiTi, 人工唾液, 可口可乐, F^-, 电化学阻抗谱

Abstract：

The electrochemical corrosion behavior of 3D-printed NiTi shape memory alloy in various types of artificial saliva was studied by means of open circuit potential measurement, polarization curve, electrochemical impedance spectroscopy and Mott-Schottky. The results show that with the increasing time of immersion in an artificial saliva, the open circuit potential of 3D-NiTi alloy shifted positively, while the thermodynamic stability of the alloy is improved. The alloy exhibited typical passivation characteristics, and the corrosion resistant and stable passive film might form. After Coke was added to the artificial saliva, the thermodynamic stability of the alloy decreased, the polarization curve moved to the lower left, the free-corrosion potential shifted negatively, and the corresponding corrosion current density increased. After adding 1% NaF, the thermodynamic stability of the alloy decreases sharply, showing an active corrosion state. The number of defects of the passive film increases 3.7 times, and F^- can greatly damage the integrity of the passive film.

Key words： 3D-NiTi artificial saliva coke F^- electrochemical impedance spectroscopy

收稿日期: 2023-05-06 32134.14.1005.4537.2023.141

ZTFLH:

TG174

基金资助:陕西省自然科学基金(2019JQ-609)

通讯作者: 刘明，E-mail: liuming0313@xjtu.edu.cn，研究方向为金属材料腐蚀与防护

Corresponding author: LIU Ming, E-mail: liuming0313@xjtu.edu.cn

作者简介: 刘明，男，1987年生，博士，副教授，2017 年毕业于北京科技大学，获博士学位。现就职于西安交通大学，副教授。2017 年~ 2021 年分别在西安交通大学和荷兰代尔夫特理工大学从事博士后研究工作。刘明博士主要研究方向为金属材料的腐蚀与力学行为。以国家重大需求为背景，与合作者开发了耐蚀性优异的3D打印NiTi 形状记忆合金，获得了高强钻杆钢疲劳与腐蚀疲劳定量规律与损伤机理，研制了适用于我国南海高温、高湿、高盐雾严酷腐蚀环境的高强耐蚀低合金钢筋，获得了海洋腐蚀环境下高强金属点阵多孔材料力学性能退化机制，并参与研制了具有优异耐蚀性的Ni 系免涂装耐候钢和连续油管钢并阐明了耐腐蚀机理。先后主持国家自然科学基金、陕西省自然科学基金、中央高校基本科研业务费、中国博士后国际交流计划-派出项目、中国博士后面上项目 (一等资助)、国家重点实验室开放课题及多项重大校企合作课题。以第一/通讯作者发表SCI 论文38 篇，他引 1000 余次。获北京市优秀毕业生称号，第一作者论文获中国腐蚀与防护学会优秀论文奖，获JMEP杂志最佳审稿人称号，担任多个国际期刊客座副主编和客座编辑。2023 年获得中国腐蚀与防护学会杰出青年成就奖。

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引用本文:

刘明, 王杰, 朱春晖, 张延晓. 3D打印NiTi形状记忆合金在模拟不同口腔环境中电化学腐蚀行为研究[J]. 中国腐蚀与防护学报, 2023, 43(4): 781-786.
LIU Ming, WANG Jie, ZHU Chunhui, ZHANG Yanxiao. Electrochemical Corrosion Behavior of 3D-printed NiTi Shape Memory Alloy in a Simulated Oral Environment. Journal of Chinese Society for Corrosion and protection, 2023, 43(4): 781-786.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2023.141 或 https://www.jcscp.org/CN/Y2023/V43/I4/781

图1 3D-NiTi合金在不同人工唾液中浸泡168 h后的OCP随时间的变化关系

图2 3D-NiTi合金在不同人工唾液中浸泡30 min后的极化曲线

表1 3D-NiTi合金在不同人工唾液中浸泡30 min后的极化曲线拟合的参数值

图3 3D-NiTi合金在不同人工唾液中浸泡不同时间后的电化学阻抗谱

图4 3D-NiTi合金在不同人工唾液中ǀZǀ0.01 Hz随时间的变化

图5 3D-NiTi合金在不同人工唾液中浸泡时EIS谱的等效电路图

表2 3D-NiTi合金在不同人工唾液中浸泡不同时间后的EIS拟合参数

图6 3D-NiTi合金在不同人工唾液中浸泡48 h后的Mott-Schottky曲线

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