加压载荷和摩擦频率对<strong>7075</strong>铝合金磨损腐蚀行为的影响

doi:10.11902/1005.4537.2025.035

中国腐蚀与防护学报

2025, Vol. 45

Issue (6): 1669-1678 CSTR: 32134.14.1005.4537.2025.035 DOI: 10.11902/1005.4537.2025.035

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加压载荷和摩擦频率对7075铝合金磨损腐蚀行为的影响

李瓒龙, 颜晴, 满成(

)

中国海洋大学材料科学与工程学院青岛 266100

Effect of Pressure Load and Friction Frequency on Wear Corrosion Behavior of 7075 Al-alloy

LI Zanlong, YAN Qing, MAN Cheng(

)

School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China

引用本文:

李瓒龙, 颜晴, 满成. 加压载荷和摩擦频率对7075铝合金磨损腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2025, 45(6): 1669-1678.
Zanlong LI, Qing YAN, Cheng MAN. Effect of Pressure Load and Friction Frequency on Wear Corrosion Behavior of 7075 Al-alloy[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1669-1678.

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摘要:

7075铝合金在海洋环境中常受到磨损与腐蚀的双重作用，导致长期累积失效，对海上作业的安全与效率构成严重威胁。然而，磨损和腐蚀对7075铝合金腐蚀行为的影响机制目前尚不清晰。基于此，本文通过改变加压载荷和摩擦频率探究7075铝合金的磨损腐蚀行为，根据摩擦系数(COF)、开路电位和动电位极化研究其磨损腐蚀行为，利用SEM观察磨损磨痕的微观形貌，及EDS能谱分析其磨痕成分。结果表明，在不同摩擦频率和加压载荷条件下COF值均有不同程度的上升；相较于静态腐蚀环境，铝合金在摩擦条件下电流密度显著增加了2~3个数量级；当摩擦作用较低时(5 N-0.01 Hz和5 N-0.10 Hz)为磨粒磨损，摩擦作用较高时则为黏着磨损，表现为大颗粒撕裂形貌；摩擦腐蚀导致材料的损失不是静态腐蚀和机械磨损的简单叠加。

关键词 ： 7075铝合金, 磨损腐蚀, 磨损机制, 交互作用

Abstract：

7075 Al-alloy is subjected to the dual effects of wear and corrosion in marine environment, resulting in long-term accumulation failure, which causes a serious threat to the safety and efficiency of offshore operations. However, the mechanism by which wear and corrosion affect the corrosion behavior of 7075 Al-alloy is still unclear. Hence, the wear and corrosion behavior of 7075 Al-alloy was studied in conditions of varying pressure load and friction frequency in terms of the coefficient of friction (COF), open circuit potential and potentiodynamic polarization, meanwhile the s morphology and composition of the friction-wear scars was examined by SEM image and the results of EDS. The main conclusions are as follows: COF values increase to different degrees under different friction frequencies and different pressure loads. Compared to static corrosion environment, the current density of 7075 Al-alloy under friction condition increases significantly by 2-3 orders of magnitude. When the friction force is relatively low (5 N-0.01 Hz and 5 N-0.10 Hz), the mechanism is abrasive wear; when the friction force is relatively high, it is adhesive wear, which is manifested as a large-particle tearing morphology. Therefore, the loss of materials caused by wear and corrosion is not a simple superposition of static corrosion and mechanical wear.

Key words： 7075 Al-alloy wear corrosion wear mechanism interaction

收稿日期: 2025-02-13 32134.14.1005.4537.2025.035

ZTFLH:

TG174

基金资助:山东省高等学校青创团队计划(2022KJ055)

通讯作者: 满成，E-mail：mancheng@ouc.edu.cn，研究方向为海洋腐蚀与防护

Corresponding author: MAN Cheng, E-mail: mancheng@ouc.edu.cn

作者简介: 李瓒龙，男，2000年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.035 或 https://www.jcscp.org/CN/Y2025/V45/I6/1669

图1 磨损腐蚀装置示意图

图2 7075铝合金磨损腐蚀的COF和OCP曲线

图3 7075铝合金磨损腐蚀的极化曲线和Tafel拟合数据

表1 7075铝合金的动电位极化曲线参数

图4 7075铝合金磨损区域3D形貌

图5 7075铝合金磨痕处的截面轮廓及磨损体积

图6 7075铝合金磨损腐蚀的磨损区域SEM图像

表2 图6中4个标记点处EDS成分分析结果 (mass fraction / %)

图7 7075铝合金磨损腐蚀的各组分损失占比

表3 不同磨损腐蚀条件下各磨损组分值

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