Abstract
The anodic behavior of Ti–Nb alloys in a deaerated 1 М H2SO4 solution was studied, and the effect of cathodic pretreatment of the alloys on the rate of their anodic dissolution was examined. The anodic dissolution of the alloys in the initial air-oxidized state without treatment is virtually independent of the component ratio in the alloy. The cathodic pretreatment activates Ti–Nb alloys containing up to 25 at. % Nb and causes a strong tendency to selective dissolution of the titanium component from the alloy matrix and to a change in the alloy surface composition. The anodic dissolution of Ti–Nb alloys containing 30 at. % Nb and more occurs after the cathodic treatment similarly to the anodic dissolution of pure niobium. The oxide layers formed on the surface of alloys of such composition exhibit high protective properties, hindering hydrogen penetration into the alloy surface layer.
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Notes
The Ti–Nb alloys were prepared and treated at the Russian Research Center Applied Chemistry (State Institute of Applied Chemistry).
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The study was performed within the framework of government assignemnt for basic research no. 0784-2020-0022.
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Translated from Zhurnal Prikladnoi Khimii, No. 10, pp. 1297–1302, December, 2021 https://doi.org/10.31857/S0044461821100042
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Semencha, A.V., Strekalovskaya, D.A. & Baturova, L.P. Specific Features of the Anodic Behavior of Ti–Nb Alloys in Acid Solutions. Russ J Appl Chem 94, 1483–1488 (2021). https://doi.org/10.1134/S1070427221110033
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DOI: https://doi.org/10.1134/S1070427221110033