Corrosion characteristics of cold gas spray coatings of reinforced aluminum deposited onto carbon steel

• Main Author: Silva, F.S.da [UNESP]
• Publication Date: 2017
• Other Authors: Bedoya, J., Dosta, S., Cinca, N., Cano, I. G., Guilemany, J. M., Benedetti, A. V. [UNESP]
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1016/j.corsci.2016.10.019; http://hdl.handle.net/11449/173868
• topic: Aluminum; EIS; Metal coatings; Polarization; SEM; XRD

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 >2000 h due to the dense structure obtained by Al and Al-Al2O3. The electrolyte reaches the substrate only after 2000 h of immersion without wetting completely the coating/substrate interface. Coatings have resisted 3000 h of salt fog test.