Mg-Al-Zn合金激光焊接头的耐蚀性研究

王少刚; 韩弘利; 曹梦艺

Mg-Al-Zn合金激光焊接头的耐蚀性研究

南京航空航天大学材料科学与技术学院, 江苏南京 211106

基金项目:

南京航空航天大学大学生创新训练计划项目(2023CX006054)

详细信息

作者简介:
王少刚,男,1966年生,博士,副教授,主要研究方向:先进材料的连接。E-mail:sgwang@nuaa.edu.cn

中图分类号: TG456.7
计量
- 文章访问数: 77
- HTML全文浏览量: 4
- PDF下载量: 30
- 被引次数: 0
出版历程
- 收稿日期: 2023-06-16
- 网络出版日期: 2023-11-07

Investigation on Corrosion Resistance of Mg-Al-Zn Alloy Joint by Laser Beam Welding

College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

摘要

摘要: 分别采用激光焊和激光填丝焊2种方法对4 mm厚的Mg-Al-Zn合金进行焊接,并对镁合金接头的腐蚀机理进行了探讨。采用极化曲线测量、电化学阻抗谱测试、SEM观察和EDS分析等方法,对获得的激光焊接头(LBW)和激光填丝焊接头(LBW-F)在3.5%NaCl溶液中的腐蚀行为进行研究,并与母材(BM)的耐蚀性进行对比,结果表明,腐蚀产物主要由Mg(OH)₂和碳酸盐组成,3种试样的耐蚀性由高至低为:LBW接头＞LBW-F接头＞BM母材。
- Mg-Al-Zn合金 /
- 激光焊 /
- 激光填丝焊 /
- 电化学腐蚀 /
- 腐蚀机理
Abstract: The 4 mm thick Mg-Al-Zn alloy plate is welded by using laser beam welding (LBW) and laser beam welding with filler wire (LBW-F), respectively. The corrosion mechanism of the Mg-Al-Zn alloy joint is discussed. Some technical means involving polarization curve measurement, electrochemical impedance spectroscopy test, scanning electron microscopy (SEM) observation and energy dispersive spectroscopy (EDS) analysis are employed. The corrosion behavior of the LBW and LBW-F joints in the 3.5%NaCl aqueous solution is investigated, and is compared with that of the base metal (BM). Results show that the corrosion product is mainly composed of Mg(OH)₂ and carbonate, and that the corrosion resistance relationship of the joints and BM can be expressed as LBW joint >LBW-F joint >BM.
- Mg-Al-Zn alloy /
- laser beam welding /
- laser beam welding with filler wire /
- electrochemical corrosion /
- corrosion mechanism

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参考文献(13)

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