Electrochemical characterization of the Al-Mg foamed materials in NaCl solutions

The AIMg-alloy was made by melting Al and Mg ingot pieces in an alumine crucible, kept in a resistance electrical furnace. The molten alloy was poured into steel containers with NaCl crystals, in order to produce the foamed material. After solidification the salt was removed using hot water. The corrosion resistance properties of the material were characterized by electrochemical techniques. The potentiodynamic polarization and electrochemical impedance spectroscopy were used to characterize the dissolution process of the alloy when exposed to 3.5% NaCl at room temperature and estimate the corrosion resistance. The addition of the alloying elements modified the microstructure and influenced the formation of more stable layer at the interface when exposed in aqueous solution.

Electrochemical characterization of the Al-Mg foamed materials in NaCl solutions Conference Paper