Corrosion Protection of Aluminum Alloys by Methoxy-Silanes(SAM)/Polyaniline Double Films

摘要

The development of alternative methods for aluminum alloys corrosion protection is as an important object of study in electrochemistry and materials engineering, due to economic and environmental reasons. In this context, this work presents a study of the electrochemical behavior of aluminum alloys (AA1050 and AA2024) coated with self-assembled monolayers (octadecyl- and propyl-trimethox-silane)-polyaniline double films by using potentiodynamic polarization curves and electrochemical impedance spectroscopy. The results have showed that both the double films present protective behavior. However, the double film with octadecyl-trimethoxy-silane is more stable and effective when the samples are exposed to the cprroding media for a longer period.