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Corrosion behavior of ultrafine-grained (UFG) pure titanium was studied in simulated seawater at high temperature to increase the probability for marine devices. The UFG Ti was prepared by equal channel angular pressing. The grain size was around 450 nm. The results showed that the corrosion current density of UFG Ti was lower than coarse-grained (CG) Ti in 3.5%NaCl solution at 80 °C, and the UFG Ti could resist pitting corrosion preferably. The basal texture of UFG Ti was stronger and the content fraction of TiO2 in the passive film was higher than CG Ti. The enhanced corrosion performance of UFG Ti at high temperature was attributed to the comprehensive impact of grain size, texture and passive film.
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Gu et al. (2022) studied this question.
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