Alfattani Rami, Yunus Mohammed, Mohamed Ahmed F, Alamro Turki, Hassan Mohamed K
Department of Mechanical Engineering, Umm Al-Qura University, Makkah City 24372, Saudi Arabia.
Mechanical Engineering Department, Faculty of Engineering, Sohag University, Sohag 82524, Egypt.
Materials (Basel). 2021 Dec 30;15(1):260. doi: 10.3390/ma15010260.
The fuel consumption of high-density automobiles has increased in recent years. Aluminum (Al) alloy is a suitable material for weight reduction in vehicles with high ductility and low weight. To address environmental problems in aircraft and maritime applications, in particular rust development and corrosion, the current study assesses the corrosion behavior during friction stir welding (FSW) of two dissimilar Al alloys (AA6061 and AA8011) in various corrosive conditions using salt spraying and submersion tests. Two acidic solutions and one alkaline solution are used in these tests, which are performed at room temperature. The two specimens (AA6061 and AA8011) and the weld region are suspended in a salt spraying chamber and a 5 wt.% NaCl solution is continually sprayed using the circulation pump for 60 h, with the specimens being weighed every 15 h to determine the corrosion rates. According to the salt spraying data, the weld zone has a higher corrosion resistance than the core components. For twenty-eight days, individual specimens are submerged in 3.5 wt.% HCl + HO and HSO + HO solutions and seawater. The weld area specimens exhibit stronger corrosion resistance than the base material specimens, and weight loss in the saltwater medium is lower when compared to the other test solutions, according to the corrosion analysis. The scanning electron microscope (SEM) analysis demonstrates that the base metal AA8011 is considerably corroded on its surface.
近年来，高密度汽车的燃油消耗有所增加。铝合金是一种适用于车辆减重的材料，具有高延展性和低重量。为了解决飞机和船舶应用中的环境问题，特别是生锈和腐蚀问题，本研究通过盐雾试验和浸泡试验评估了两种不同铝合金（AA6061和AA8011）在摩擦搅拌焊接（FSW）过程中在各种腐蚀条件下的腐蚀行为。这些试验在室温下进行，使用了两种酸性溶液和一种碱性溶液。将两个试样（AA6061和AA8011）以及焊接区域悬挂在盐雾试验箱中，使用循环泵持续喷洒5 wt.%的NaCl溶液60小时，每15小时对试样称重以确定腐蚀速率。根据盐雾试验数据，焊接区域的耐腐蚀性高于核心部件。将单个试样分别浸泡在3.5 wt.%的HCl + HO和HSO + HO溶液以及海水中28天。根据腐蚀分析，焊接区域的试样比母材试样表现出更强的耐腐蚀性，并且与其他试验溶液相比，在海水介质中的重量损失更低。扫描电子显微镜（SEM）分析表明，母材AA8011的表面受到了相当程度的腐蚀。
