Permeation of saline solution in Al2O3-13Â wt.% TiO2 coatings elaborated by atmospheric plasma spraying

► Alumina 13 wt.% titania coatings were elaborated onto aluminum substrates by APS. ► Two feedstock powders with different particle size distribution were used. ► The corrosion protective capacity of coatings was evaluated by EIS. ► The coatings protect aluminum substrate of corrosion produced by saltwater. ► Coating elaborated from finer powder has a higher corrosion protection.