不同磁场强度下铝镁合金腐蚀行为研究

doi:10.11902/1005.4537.2021.247

中国腐蚀与防护学报

2022, Vol. 42

Issue (5): 833-838 DOI: 10.11902/1005.4537.2021.247

海洋材料腐蚀与防护专栏

本期目录 | 过刊浏览

不同磁场强度下铝镁合金腐蚀行为研究

黄连鹏, 张欣(

), 熊伊铭, 陶嘉豪, 王泽华, 周泽华

河海大学力学与材料学院南京 211100

Corrosion Behavior of Al-3.0Mg-xRE/Fe Alloys Under Magnetic Field of Different Intensities

HUANG Lianpeng, ZHANG Xin(

), XIONG Yiming, TAO Jiahao, WANG Zehua, ZHOU Zehua

College of Mechanics and Materials, Hohai University, Nanjing 211100, China

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摘要:

通过扫描电子显微镜 (SEM)、能谱分析仪 (EDS) 和电化学工作站研究了不同磁场强度下铝镁合金的腐蚀行为,探索了磁场强度对不同物相特性铝镁合金腐蚀行为的作用规律。研究结果表明：与普通环境相比,磁场中Al-3.0Mg-xRE/Fe合金的腐蚀电位、点蚀电位均升高,腐蚀电流密度降低,浸泡后点蚀坑数量和尺寸均减少,磁场能够一定程度地降低Al-3.0Mg-xRE/Fe合金的腐蚀和点蚀敏感性及腐蚀速率。随着磁场强度的增高,磁场抑制合金腐蚀的作用增强。

关键词 ：不同物相特性铝镁合金, 稀土元素, 磁场, 腐蚀行为, 点蚀

Abstract：

The corrosion behavior of Al-3.0Mg-xRE/Fe alloys in 3.5%NaCl solution in the presence of magnetic field of different intensities was studied by means of electrochemical workstation, and scanning electron microscope (SEM) with energy disperse spectroscopy (EDS). The results indicated that the applied magnetic field could enhance the corrosion potential and pitting corrosion potential, and reduce the corrosion current density of Al-3.0Mg-xRE/Fe alloys. At the same time, the amount and size of the formed pits in the presence of magnetic field were lower than those in the absence of magnetic field. Magnetic field can reduce the corrosion- and pitting-sensitivity, and the corrosion rate of Al-3.0Mg-xRE/Fe alloys. With the increase of magnetic field intensity, the inhibition effect of magnetic field is enhanced.

Key words： Al-Mg alloy with different electrode potential phases rare earth elements magnetic field corrosion behavior pitting corrosion

收稿日期: 2021-09-22

ZTFLH:

TG.174.442

基金资助:国家自然科学基金(51909071);江苏省自然科学基金(BK20190493);中央高校基本科研业务费专项(B220202040)

通讯作者: 张欣 E-mail: zhangxin.007@163.com

Corresponding author: ZHANG Xin E-mail: zhangxin.007@163.com

作者简介: 黄连鹏,男,1997年生,硕士生

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引用本文:

黄连鹏, 张欣, 熊伊铭, 陶嘉豪, 王泽华, 周泽华. 不同磁场强度下铝镁合金腐蚀行为研究[J]. 中国腐蚀与防护学报, 2022, 42(5): 833-838.
Lianpeng HUANG, Xin ZHANG, Yiming XIONG, Jiahao TAO, Zehua WANG, Zehua ZHOU. Corrosion Behavior of Al-3.0Mg-xRE/Fe Alloys Under Magnetic Field of Different Intensities. Journal of Chinese Society for Corrosion and protection, 2022, 42(5): 833-838.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.247 或 https://www.jcscp.org/CN/Y2022/V42/I5/833

图1 电化学试验装置

图2 Al-3.0Mg-xRE/Fe合金表面SEM形貌

表1 Al-3.0Mg-xRE/Fe合金的EDS分析结果

图3 不同磁场强度下Al-3Mg-xRE/Fe合金在3.5%NaCl溶液中浸泡7 d后表面形貌

图4 Al-3.0Mg-0.2RE/Fe合金在3.5%NaCl溶液中浸泡7 d后的表面形貌

表2 Al-3.0Mg-0.2RE/Fe合金在3.5%NaCl溶液中浸泡7 d后的EDS分析结果

图5 不同磁场强度下Al-3Mg-xRE/Fe合金Tafel曲线

表3 不同磁场强度下Al-3Mg-xRE/Fe合金的Ecorr、Icorr与Epit

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