Mathur, Shubhra and Jain, Rohit and Kumar, Praveen and Sachdev, K. and Sharma, S. K. (2012) Effect of nanocrystalline phase on the electrochemical behavior of the alloy Ti60Ni40. Journal of Alloys and Compounds, 538. pp. 160-163. ISSN 0925-8388

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Abstract

Polarization studies were carried out on crystalline, amorphous and nanocrystalline states of the alloy Ti60Ni40 in 1 M NaCl aqueous medium at room temperature. It was observed that nanocrystalline state exhibits superior corrosion resistance as compared to other states of the alloy Ti60Ni40. Cyclic voltammetry studies and weight loss data corroborates the polarization studies. X-ray photoelectron spectroscopy (XPS) technique was used in order to decipher the nature of the oxide film formed after corrosion test on the specimens of the alloy Ti60Ni40. The crystalline specimen of the alloy Ti60Ni40 shows the presence of Ti2+, Ti3+ and Ti4+ species along with some unoxidized Ti in metallic form (Ti-0) whereas the amorphous specimen consists of Ti3+ and Ti4+ species. On the other hand nanocrystalline specimen contains only Ti4+ species. Thus it is likely that the presence of fewer species and the absence of Ti3+ in the oxide film formed on nanocrystalline specimen of Ti60Ni40 lead to the formation of a film with greater homogeneity and protective quality in comparison to the films formed on crystalline and amorphous states of the alloy Ti60Ni40 in 1 M NaCl aqueous medium.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Materials Science Metallurgy & Metallurgical Engineering Physical Chemistry/Chemical Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	20 Feb 2020 08:31
Last Modified:	20 Feb 2020 08:31
URI:	http://npl.csircentral.net/id/eprint/3623

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