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| 水浸搅拌摩擦焊铝/镁接头腐蚀行为研究 |
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黄体方1, 王艺霏1, 陈思浩2, 李峻臣2, 万 龙1,3, 孟祥晨1,3, 谢聿铭1,3, 黄永宪1,3
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1. 先进焊接与连接国家重点实验室，哈尔滨工业大学，哈尔滨 150001;2. 上海航天精密机械研究所，
上海 201600;3. 郑州研究院，哈尔滨工业大学，郑州 450046
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| 摘要: |
| 以水浸环境下铝/镁搅拌摩擦焊异质接头为研究对象，研究接头的电化学腐蚀行为。结果表明，在转速700～1000r/min范围内，接头表面和内部均无明显缺陷，在焊核区两种材料发生了较大程度的混合；焊缝不同区域的耐腐蚀性能由好到差排序为：BM-6061>BM-AZ31B>SZ；随着主轴转速的增加，接头的自腐蚀电位升高，腐蚀电流密度的提高，即主轴转速的增大会导致接头的腐蚀倾向减小而腐蚀速率增大，接头的耐腐蚀性能降低。 |
| 关键词: 铝/镁 水浸搅拌摩擦焊 电化学腐蚀 开路电位 腐蚀电流密度 |
| 基金项目:国家自然科学基金项目（521**301、522**350） |
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| Corrosion Behavior of Submerged Friction Stir Welded AZ31B Magnesium Alloy and 6061 Aluminum Alloy Dissimilar Joints |
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Huang Tifang1, Wang Yifei1, Chen Sihao2, Li Junchen2, Wan Long1,3, Meng Xiangchen1,3, Xie Yuming1,3, Huang Yongxian1,3
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1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001;2. Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600;3. Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450046
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| Abstract: |
| The electrochemical corrosion behavior of submerged friction stir welded aluminum/magnesium dissimilar joints was studied. The results showed that within the rotational speed of 700r/min to 1000r/min, there were no obvious defects on the surface and inside of the joint, and there was a significant mixing of the two materials at stir zone; The corrosion resistance of different areas of the weld seam is ranked in descending order: BM-6061>BM-AZ31B>SZ. As the spindle speed increases, the open circuit potential of the joint increases, and the corrosion current density increases. This means an increase in spindle speed will lead to a decrease in the corrosion tendency of the joint and an increase in corrosion rate, resulting in a decrease in the corrosion resistance of the joint. |
| Key words: Al/Mg submerged friction stir welding electrochemical corrosion open circuit potential corrosion current density |
