Enhanced corrosion resistance of Ni-W alloy with inclusion of TiN nanoparticles by electrodeposition method

Electrodeposition of Ni-W-TiN nanocomposite on mild steel substrate from an ammoniacal citrate bath containing dispersed titanium nitride has been demonstrated. The structure, surface morphology, composition and corrosion resistance properties of the nanocomposite deposits have been characterised by...

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Bibliographic Details
Published in:Transactions of the Institute of Metal Finishing 2013-07, Vol.91 (4), p.202-206
Main Authors: Arunsunai Kumar, K, Paruthimal Kalaignan, G, Muralidharan, V S
Format: Article
Language:English
Subjects:
Corrosion resistance
Electrodeposition
Microhardness
Nanocomposite
Nanocomposites
Nanomaterials
Nanostructure
Ni-W-TiN
Nickel
Nickel base alloys
Protective coatings
Titanium nitride
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Summary:Electrodeposition of Ni-W-TiN nanocomposite on mild steel substrate from an ammoniacal citrate bath containing dispersed titanium nitride has been demonstrated. The structure, surface morphology, composition and corrosion resistance properties of the nanocomposite deposits have been characterised by using various techniques. X-ray diffraction analysis (XRD) of the electrodeposited Ni-W-TiN nanocomposite shows that it is fcc crystalline. Scanning electron micrography (SEM) reveals smaller grains and uniform distribution of the titanium nitride in the alloy matrix. The microhardness of the nanocomposite coatings is higher than that of the alloy. The corrosion resistance of the electrodeposited nanocomposite evaluated by electrochemical impedance and Tafel polarization studies showed that the Ni-W-TiN nanocomposite is more corrosion resistant than the Ni-W alloy deposit. The finer grain and uniform distribution of the titanium nitride in alloy matrix favour the enhanced microhardness and corrosion resistance of the nanocomposite.
ISSN:0020-2967
1745-9192
DOI:10.1179/0020296713Z.000000000110