The Behaviour of AA5754 and AA5052 Aluminium Alloys in Alkaline Etching Solution: Similarity and Difference

Zelong Jin, Changrun Cai, Yudie Yuan, DaeHoon Kang, John Hunter, Xiaorong Zhou

Research output: Contribution to journalArticlepeer-review

Abstract

In the present study, the behaviour of AA5754 and AA5052 alloys in alkaline solution is investigated using analytical electron microscopy. Significant differences in dissolution rate, change of intermetallic particle population density, compositional and morphological change of various intermetallic particles of the two alloys are observed. The dissolution rate of AA5754 alloy is approximately 1.3 µm/min., which is significantly lower than the dissolution rate of 2.3 µm/min. for AA5052 alloy. After alkaline etching, the population density of coarse intermetallic particles (mainly Mn-rich) on AA5754 alloy surface is significantly reduced whereas the population density of coarse intermetallic particles (mainly Fe-rich) on AA5052 alloy surface remains almost unchanged. Further, the root cause for the different behaviour of the two alloys in alkaline solution is discussed.
Original languageEnglish
JournalMaterials Characterization
Publication statusAccepted/In press - 13 Nov 2020

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