Effect of Cyclic Stress on Corrosion Behavior of 7A09 Aluminum Alloy in Tropical Coastal Atmosphere
Effect of Cyclic Stress on Corrosion Behavior of 7A09 Aluminum Alloy in Tropical Coastal Atmosphere
复制标题
热带沿海大气中循环应力对7A09铝合金腐蚀行为的影响
DOI：
10.20964/2022.12.03
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发表时间：
2022-12
期刊：
影响因子：
--
通讯作者：
Xiaohui Wang
中科院分区：
文献类型：
--
作者：
Laizheng Luo;Bin Wang;Jie Zhou;Jie Liu;Xiaohui Wang
为了模拟海洋设备上层建筑结构材料的实际使用条件，本工作以热带沿海大气作为7A09合金薄电解质层的腐蚀环境，并利用专门设计的室外装置施加弹性循环应力。然后研究了7A09合金在薄电解质层大气腐蚀和弹性循环应力共同作用下的腐蚀行为。结果表明，在试验条件下，弹性循环应力能够显着加速7A09合金的腐蚀过程，并且对阴极反应的增加贡献更大。所施加的应力对机械性能退化的影响比对腐蚀形态的影响更大。此外，还讨论了薄电解质层的大气腐蚀与弹性循环应力之间的相互作用机制。
In order to simulate the actual service conditions of the structural materials used in the superstructure of marine equipment, the tropical coastal atmosphere was used as the corrosion environment of thin electrolyte layer for 7A09 alloy in this work, and the specifically designed outdoor device was utilized to apply the elastic cyclic stress. Then the corrosion behavior of 7A09 alloy under the combined effects of atmospheric corrosion of thin electrolyte layer and elastic cyclic stress was investigated. The results indicate that the elastic cyclic stress can accelerate the corrosion process of 7A09 alloy significantly under the test conditions, and which contributes more to the increase in the cathodic reaction. The applied stress has a greater effect on the degradation of mechanical properties than on the corrosion morphology. In addition, the interaction mechanism between atmospheric corrosion of thin electrolyte layer and elastic cyclic stress was also discussed.