采取室内盐雾试验和电化学阻抗谱研究了1050A铝合金在模拟海洋大气环境中的腐蚀行为, 采用扫描电镜(SEM)、X射线衍射仪(XRD)和能谱仪(EDS)观察分析腐蚀产物表面形貌、结构和组成。结果表明, 随着腐蚀的不断进行, 腐蚀产物不断增多, 失重增加, 阻抗值逐渐减小。腐蚀产物形貌主要以团状或块状的形式存在, 并不断向外延伸扩大, 呈现不均匀的凹凸形貌; 腐蚀产物主要有铝的氯化物、Al2O3、Al(OH)3和AlO(OH)等。电化学阻抗谱拟合结果显示, 腐蚀速率呈先增加后降低的趋势。

Salt fog test and electrochemical impedance spectroscopy (EIS) were used to study the corrosion of 1050A aluminium alloy in was in simulated marine atmosphere environment. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) were employed to observe and analyze the surface morphology, structure and composition of the corrosion products of 1050A aluminium alloy in marine atmosphere. The results showed that corrosion products increased, mass loss increased and the resistance value gradually decreased with testing hours prolonging. Surface observation revealed that corrosion products were accumulated and agglomerated. The corrosion products were mainly aluminum chloride, Al2O3, Al(OH)3, AlO(OH) and so on. The electrochemical impedance spectroscopy fitting results show that the corrosion rate first increased and then decreased.