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- W4382064221 abstract "Corrosion behavior of the Ti-22Al-25Nb alloy, thermally oxidized at 850 °C for 1 h, 10 h and 20 h, respectively was studied in synthetic seawater. SEM, XRD and Raman analysis confirm the presence of mostly of the rutile niobian compound, Ti0.952Nb0.048O2 while minor phases of AlNbO4, NbOx and Al2O3 are depicted in the oxidic layer developed for the oxidized samples. Potentiodynamic polarization and electrochemical impedance spectroscopy experiments performed after 72h of immersion in synthetic seawater indicated different resistance corrosions. Thus, thin oxide layer of about 1.5 μm, formed at 850 °C for 10 h, presents the best resistance corrosion amidst investigated specimens (icorr= 2.1 e-8Acm-2, two time smaller than untreated alloy and ten time smaller than thermally oxidized for 20h). Based on the corrosion protective ability, the untreated and thermally oxidized samples can be ranked as follows: S5 (10 h at 850 °C)>S1 (untreated)>S4 (1 h at 850 °C)>S6 (20 h at 850 °C). According to the EIS measurement results a strong capacitive response for the S5 sample, illustrated by a large phase angle which remains constant over a wide range of frequency, and a high resistance of layer which was not significantly reduced after 72 h exposure in synthetic seawater are registered." @default.
- W4382064221 created "2023-06-27" @default.
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- W4382064221 date "2015-10-01" @default.
- W4382064221 modified "2023-10-06" @default.
- W4382064221 title "Corrosion Behavior of a Thermally Oxidized Orto-Titanium Aluminide in Synthetic Seawater" @default.
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- W4382064221 doi "https://doi.org/10.1016/s1452-3981(23)11095-9" @default.
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