Abstract
Aluminum rich coatings have been proven to be promising protective coatings in magnesium alloy products due to their high potential and ability to form passive films. This work reports the corrosion resistance of Al, AlTiSi and AlTiSiN coatings synthesized by magnetron sputtering on AZ80M magnesium alloy. The results show that the AlTiSiN coated magnesium alloy exhibits the outstanding corrosion resistance with obviously high polarization resistance (Rp) and corrosion potential (Ecorr), and significantly low corrosion current density (Icorr), due to its greatly compact and directionless structure. The salt spray test confirms that the AlTiSiN coated magnesium alloy has more durable resistance to chloride ion immersion compared to Al and AlTiSi coated magnesium alloy.
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