Investigation of Electrochemical Corrosion Behaviour of 6082 Aluminum Alloy under Simulated Deicing Agent Conditions

Abstract

In this study, the aluminum alloy of 6082 with different treatment processes (T1 and T6) was tested in simulated artificial deicing agent solution. The polarization curves show that the alloy suffered from pitting attack, the corrosion resistance of extruded sample (T1) is lower than that of forged sample (T6) in the same medium solution. With the increase of chloride ion concentration, the corrosion current density of T1 and T6 samples increased, the maximum corrosion depth increased, and the corrosion resistance of alloy samples decreased. The morphology on the polarized alloys show that the the surface of T1 sample revealed a higher number of pits. And the difference of corrosion resistance between T1 and T6 is closely related to the difference of microstructure.