Corrosion characteristics of cold gas spray coatings of reinforced aluminum deposited onto carbon steel. (January 2017)

• Record Type: Journal Article
• Authors: Silva, F.S.da; Bedoya, J.; Dosta, S.; Cinca, N.; Cano, I.G.; Guilemany, J.M.; Benedetti, A.V.
• Is Part Of: Corrosion science. Volume 114(2017)
• Page Start: 57
• Page End: 71
• Publication Date: 2017-01
• Subjects: Aluminum -- Metal coatings -- EIS -- Polarization -- SEM -- XRD; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.10.019
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Al and Al-Al2 O3 /Al coatings were sprayed on low carbon steel by CGS. Al-Al2 O3 composite was applied on the top layer and Al layer on the substrate. The higher mechanical resistance is the main benefit of the addition of Al2 O3 . Al/grit blasted carbon steel showed the highest long-term corrosion performance. Abstract: The morphology, chemical, mechanical and corrosion characterization of starting materials, and Al and Al-Al2 O3 /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-Al2 O3 /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-Al2 O3 . 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.