Combination of high strength and corrosion resistance in AA5052 alloy using cryorolling and micro arc oxidation. (2021)

• Record Type: Journal Article
• Authors: Sunil Raj, S.; Blessto, B.; Dhanasekaran, S.; Sivaprasad, K.; Muthupandi, V.; Sriramani, N.
• Is Part Of: Materials today. Volume 39:Part 4(2021)
• Page Start: 1738
• Page End: 1742
• Publication Date: 2021
• Subjects: Micro arc oxidation -- 5052 aluminum alloy -- Corrosion resistance -- Cryorolling -- High tensile strength; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.06.305
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: For enhancing the strength of AA 5052 alloy, cryorolling is performed up to 50% and 75% reduction. The 75% reduction cryorolling shows excellent strength than the unrolled and 50% reduction alloy. However. Cryorolling of AA5052 alloy results in poor corrosion resistance. The reduction in corrosion resistance is due to an increase in dislocation density by cryorolling. Hence micro-arc oxidation (MAO) is adapted to coat Al2 O3 on the surface to reduce the corrosion rate of cryorolled sheets. MAO is performed with three borax concentration viz. 0, 1 and 2 g in the solution. The increase in borax concentration up to 1% shows high corrosion resistance and a further increase in borax concentration has shown detrimental influence on corrosion resistance which is due to the delamination of the coating with severe cracking.