Exfoliation corrosion susceptibility of rolled sheets of 7068 and 5059 aluminum alloys is investigated using immersion tests. The evolution of exfoliation attack with immersion time is ascertained by observing the depth of attack. Cross-sectional morphology of the corrosion damage in the form of localized dissolution and delamination provided insights into the severity of exfoliation corrosion. It is observed that surface roughness caused due to electrochemical degradation did not reveal the extent of exfoliation damage. The effects of alloy temper on the exfoliation corrosion behavior are explained in terms of the grain boundary precipitates, their distribution, and microchemistry.

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