盐水环境中搅拌摩擦焊接2024铝合金的腐蚀行为
Corrosion Behavior of the Friction Stir Weld of 2024 Aluminum Alloy in Salt Solution
摘 要
采用全浸泡法对2024铝合金母材与搅拌摩擦焊接接头在3.5%盐水环境中的腐蚀性能进行了测试，并对腐蚀速率进行了计算，对腐蚀形貌进行了观察。结果表明：腐蚀由点蚀开始，最后发展为剥落腐蚀；搅拌摩擦焊接（FSW）接头上各区的腐蚀速率大小为热影响区和焊核区 > 热机影响区 > 母材区。搅拌摩擦焊焊缝的腐蚀速率高于母材的，即其耐蚀性与母材相比变差。
腐蚀行为
腐蚀速率
腐蚀形貌
friction stir welding
corrosion behavior
corrosion rate
corrosion morphology
Abstract
The full immersion etching method was utilized to study the corrosion properties of the base material and friction stir weld (FSW) of 2024 aluminum alloy in salt solution environment. The corrosion rate was calaulated and the corrosion morphology was observed. The results show that the corrosion started from pitting and finally became exfoliation corrosion. The corrosion rate on different narrow areas of weld joint followed the rule:heat affected area and welding area > thermo-mechanically affected zone > base area. The corrosion rate of the FSW weld was faster than that of base material and the corrosion resistance of FSW weld was worse than that of base material.
中图分类号 TB304 DOI 10.11973/fsyfh-201801009
所属栏目 试验研究
基金项目
收稿日期 2016/7/30
修改稿日期
网络出版日期
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联系人作者王希靖(Wangxj@lut.cn)
引用该论文: WANG Xijing,MA Xiaofei,ZHANG Jinyin,WEI Xueling. Corrosion Behavior of the Friction Stir Weld of 2024 Aluminum Alloy in Salt Solution[J]. Corrosion & Protection, 2018, 39(1): 45
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【14】张津,李峰,郑林,等. 2024-T351铝合金搅拌摩擦焊焊件内部残余应力测试[J]. 机械工程学报,2013,49(2):28-34.
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