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The impact of cryorolling (CR) and room temperature rolling (RTR) followed by artificial aging on the corrosion characteristics of 2195 Al−Li alloy (AA2195) was studied. Transmission electron microscope, scanning electron microscope, optical microscope, intergranular corrosion experiment, and electrochemical experiment were used. Throughout different stages of aging treatment, the corrosion behavior of both CR and RTR samples exhibited a sequential progression of pitting corrosion, followed by intergranular corrosion, and then pitting corrosion again. The corrosion rates of both samples initially showed an increase, followed by a gradual stabilization over time. The size and density of T 1 phase significantly influenced the corrosion performance of the alloy. During the peak aging and over-aging stages, the CR sample exhibited superior corrosion resistance to the RTR sample, attributed to its finer T 1 phase.
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Xiao et al. (2025) studied this question.
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