Article ID Journal Published Year Pages File Type
1471834 Corrosion Science 2006 15 Pages PDF
Abstract

The electrochemical behaviour of Mg-rich primer on Al Alloys, AA2024 and AA7075, has been studied via Electrochemical Impedance Spectroscopy (EIS), Open Circuit Potential (OCP) and potentiodynamic polarization. Results showed that the Mg-rich primer provides sacrificial protection to the Al substrate by a two-stage mechanism. In a first stage, corrosion of aluminium is prevented by cathodic polarization, whereas at a later stage the precipitation of a porous barrier layer of magnesium oxide was observed.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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