摘要
The corrosion and pitting behavior of pure aluminum 1060 exposed to Nansha Islands marine atmosphere for 34 months was investigated based on mass loss measurement,scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS),and electrochemical impedance spectroscopy(EIS).The results indicated that serious pitting corrosion occurred on the surfaces of pure aluminum.The corrosion rate after exposure for 13 months was approximately 1.28 g/(m^(2)·a).The XPS results showed that the corrosion products were Al_(2)O_(3),Al(OH)_(3),and AlCl_(3).Moreover,the corrosion product layer was more protective than the native oxide film,and the protectiveness first increased and then decreased.Finally,the shape of the pits was evaluated using statistical analysis.
通过质量损失测量、扫描电子显微术、能谱分析、X射线光电子能谱和电化学阻抗谱等技术研究纯铝1060在南沙群岛海洋大气环境中暴露34个月后的腐蚀行为以及点蚀行为。结果表明,在纯铝表面发生严重的点蚀,并且暴露13个月后的平均腐蚀速率达到1.28 g/(m^(2)·a)。X射线光电子能谱的测试结果表明主要的腐蚀产物为Al_(2)O_(3)、Al(OH)_(3)和AlCl_(3)。此外,形成的腐蚀产物层相比于自然形成的氧化膜更具有保护作用,并且保护作用先增加然后降低。最后,蚀坑的形状通过统计分析的方法进行估计。
基金
the National Natural Science Foundation of China(No.51671197)
Special Project of Chinese Academy of Sciences(No.XDA130040502).
