Corrosion Behavior of Aluminum Alloy 1050A During Cyclic Wet-Dry Immersion Test in Simulated Marine Atmospheric Environment

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.