Abstract
The morphology, chemical, mechanical and corrosion characterization of starting materials, and Al and Al-Al2O3/Al coatings obtained by Cold Gas Spray and applied on common steel substrate were performed. An Al coating on a ground or grit blasted substrate, and Al-Al2O3/Al coating on ground mild carbon steel have been compared. The electrochemical results showed that the coatings protect the substrate for immersion times >2000h due to the dense structure obtained by Al and Al-Al2O3. The electrolyte reaches the substrate only after 2000h of immersion without wetting completely the coating/substrate interface. Coatings have resisted 3000h of salt fog test.
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