Mathur, Shubhra and Vyas, Rishi and Jain, Rohit and Kumar, Praveen and Sachdev, K. and Sharma, S. K. (2011) Electrochemical behavior of different structural states of the alloy Ti60Ni40. Journal of Non-Crystalline Solids, 357 (16-17). pp. 3084-3087. ISSN 0022-3093

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Potentiodynamic polarization studies were carried out on nanocrystalline I, nanocrystalline II and nanocrystalline III states having crystallite size 35 ± 5 nm, 18 ± 2 nm and 10 ± 2 nm of the alloy Ti60Ni40 in 1 M H2SO4 aqueous medium. It was observed that the nanocrystalline III state exhibits superior corrosion resistance as compared to the nanocrystalline II and nanocrystalline I states of the alloy Ti60Ni40. XPS studies were also performed after corrosion test and it was observed that nanocrystalline III state contains only Ti2+ and Ti4+ species whereas nanocrystalline I and nanocrystalline II state contains Ti2+, Ti3+and Ti4+ along with some unoxidized metallic Ti0 in the case of nanocrystalline I state. Thus the small crystallite size and the presence of only Ti2+ and Ti4+ species in the form of TiO and TiO2 leads to the formation of a protective oxide film which is adherent, stable and improves the corrosion resistance of the nanocrystalline III state of the alloy Ti60Ni40.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords: Corrosion; Polarization; X-ray photoelectron spectra
Subjects: Materials Science
Depositing User: Mr. Abhishek Yadav
Date Deposited: 18 Dec 2012 07:43
Last Modified: 18 Dec 2012 07:43

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