Abstract
The surface activity of aluminium alloys in artificial sea water has been studied using electrochemical testing methods Electrochemical Impedance Spectroscopy (EIS), polarisation curves and electrode potential versus time measurements have been employed to study the main features of the processes taking place at the alloy/solution interface. The results obtained were discussed in terms of morphological structure and surface electrochemical behaviour correlation. The knowledge of the surface composition and the morphological structure has been performed using Scanning Electron Microscopy (SEM) coupled with Energy Dispersive X-ray Spectroscopy (EDXS). The Al-Mg-Zn alloys have been prepared using metals of high purity. The methodology of preparation allows the formation of intermetallic phases which strongly influence the anodic behaviour of aluminium.
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