TC4钛合金在含S2- 海水中的腐蚀磨损行为研究

doi:10.11902/1005.4537.2025.044

中国腐蚀与防护学报

2025, Vol. 45

Issue (6): 1764-1772 CSTR: 32134.14.1005.4537.2025.044 DOI: 10.11902/1005.4537.2025.044

研究报告

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TC4钛合金在含S^2- 海水中的腐蚀磨损行为研究

王杰¹^,², 赵平平², 王春婷², 竺婷婷², 杨丽景²(

), 宋振纶²

1 宁波大学材料科学与化学工程学院宁波 315211
2 中国科学院宁波材料技术与工程研究所海洋关键材料全国重点实验室宁波 315201

Synergistic Tribo-corrosion Behavior of TC4 Ti-alloy in Artificial Seawater Containing Sulfur Ions

WANG Jie¹^,², ZHAO Pingping², WANG Chunting², ZHU Tingting², YANG Lijing²(

), SONG Zhenlun²

1 Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
2 State Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

引用本文:

王杰, 赵平平, 王春婷, 竺婷婷, 杨丽景, 宋振纶. TC4钛合金在含S^2- 海水中的腐蚀磨损行为研究[J]. 中国腐蚀与防护学报, 2025, 45(6): 1764-1772.
Jie WANG, Pingping ZHAO, Chunting WANG, Tingting ZHU, Lijing YANG, Zhenlun SONG. Synergistic Tribo-corrosion Behavior of TC4 Ti-alloy in Artificial Seawater Containing Sulfur Ions[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1764-1772.

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摘要:

硫化物在特殊海洋环境(如深海热液区、工业污染区等)中十分常见，本研究通过电化学技术原位监测TC4钛合金的腐蚀磨损过程，并利用台阶仪与3D轮廓仪对磨损后的体积进行量化，结合扫描电子显微镜和能谱仪观测微观形貌及成分，讨论S^2-浓度对TC4钛合金在3.5%NaCl溶液中腐蚀-磨损动态损伤过程中的影响。结果表明，TC4钛合金的总腐蚀磨损量随着S^2-浓度的增加显著增大，且磨损机制从单纯磨料磨损转变为磨料、疲劳磨损共存的复合机制。在腐蚀磨损过程中，当S^2-浓度从0 mmol/L增加到60 mmol/L时，TC4钛合金的开路电位降低了400 mV左右。同时，腐蚀电流密度增大了近2个数量级。腐蚀磨损交互量化分析表明，腐蚀促进磨损分量占比从2.94%提升到5.59%。海水环境中的S^2-破坏了钛合金表面钝化膜，加速局部腐蚀并加剧磨痕区域的二次溶解，最终导致TC4钛合金在腐蚀磨损过程中的耦合损伤效应显著增强。

关键词 ： TC4钛合金, S^2-, 腐蚀磨损, 耦合损伤, 电化学

Abstract：

Sulfide is very common in special marine environments, such as microbial metabolism process, deep-sea hydrothermal area, industrial pollution area etc. In this study, the corrosion and wear process of TC4 Ti-alloy was monitored in situ by electrochemical technology, and the wear volume was quantified by step profiler and 3D profilometer. The microstructure and composition were characterized by scanning electron microscope and energy dispersive spectrometer. The effect of sulfur ion concentration on the corrosion-wear dynamic damage process of TC4 Ti-alloy in 3.5%NaCl solution was systematically revealed. The results show that the total corrosion wear amount of TC4 Ti-alloy increases significantly with the increase of sulfur ion concentrations, and the wear mechanism changes from pure abrasive wear to the composite mechanism of abrasive and fatigue wear. During the corrosion wear process, when the sulfur ion concentrations increased from 0 to 60 mmol/L, the OCP of TC4 Ti-alloy decreased by about 400 mV. At the same time, the corrosion current density increased by nearly 2 orders of magnitude. The interactive quantitative analysis of corrosion and wear shows that the proportion of corrosion-promoted wear components increased from 2.94% to 5.59%. The sulfur ion in the 3.5%NaCl solution destroyed the passivation film on the surface of the TC4 Ti-alloy, accelerated the local corrosion and aggravated the secondary dissolution of the wear scar area, which eventually led to the significant enhancement of the coupling damage effect of TC4 Ti-alloy during the corrosion wear process. This study provides an important reference for the durability design of titanium alloy components in marine equipment operating in a sulfur-containing medium environment.

Key words： TC4 Ti-alloy sulfur ions tribo-corrosion coupling damage electrochemistry

收稿日期: 2025-02-13 32134.14.1005.4537.2025.044

ZTFLH:

TG174

基金资助:国家重点研发计划(2022YFB3808800);宁波市重点科技项目(2024Z130)

通讯作者: 杨丽景，E-mail：yanglj@nimte.ac.cn，研究方向为金属腐蚀与防护

Corresponding author: YANG Lijing, E-mail: yanglj@nimte.ac.cn

作者简介: 王杰，男，2000年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.044 或 https://www.jcscp.org/CN/Y2025/V45/I6/1764

图1 TC4钛合金显微组织的SEM像

图2 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中静态腐蚀和动态腐蚀磨损条件下的动电位极化曲线

表1 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中的动电位极化曲线拟合结果

图3 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中腐蚀磨损条件下的原位开路电位变化曲线

图4 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中的摩擦系数曲线

图5 TC4钛合金在含不同浓度S2-的3.5%NaCl溶液中摩擦后的3D轮廓图像

表2 TC4钛合金在含不同浓度S2-的3.5%NaCl溶液中腐蚀磨损后磨痕参数

图6 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中摩擦后的腐蚀磨损表面形貌

图7 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中摩擦后磨损区域的EDS分析结果

表3 TC4钛合金在不同浓度S2-的3.5%NaCl溶液中腐蚀磨损后各体积损失分量

图8 TC4钛合金在含有不同浓度S2-的3.5%NaCl溶液中腐蚀磨损后各体积损失占总体积损失的比例

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