Microstructural,phase evolution and corrosion properties of silicon carbide reinforced pulse electro deposited nickel–tungsten composite coatings
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
View Archive Info| Field | Value | |
| Title |
Microstructural,phase evolution and corrosion properties of silicon carbide reinforced pulse electro deposited nickel–tungsten composite coatings
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| Creator |
Singh, Swarnima
Sribalaji, M. Wasekar, Nitin P. Joshi, Srikant Sundararajan, G. Singh, Raghuvir Keshari, Anup Kumar |
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| Subject |
Corrosion Science
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| Description |
Silicon carbide (SiC) reinforced nickel–tungsten (Ni–W) coatings were successfully fabricated on steel
substrate by pulse electrodeposition method (PED) and the amount of SiC was varied as 0 g/l, 2 g/l, and
5 g/l in Ni–W coating. Effect of subsequent addition of SiC on microstructures, phases and on corrosion
property of the coating was investigated. Field emission scanning electron microscopy (FE-SEM) image
of the surface morphology of the coating showed the transformation from the dome like structure to
turtle shell like structure. X-ray diffraction (XRD) of Ni–W–5 g/l SiC showed the disappearance of (220)
plane of Ni(W), peak splitting in major peak of Ni(W) and formation of distinct peak of W(Ni) solid
solution. Absence of (220) plane, peak splitting and presence of W(Ni) solid solution was explained by
the high resolution transmission electron microscopy (HR-TEM) images. Tafel polarization plot was used
to study the corrosion property of the coatings in 0.5 M NaCl solution. Ni–W–5 g/l SiC coating was showed
higher corrosion resistance (i.e. ∼21% increase in corrosion potential, E corr ) compared to Ni–W coating.
Two simultaneous phenomena have been identified for the enhanced corrosion resistance of Ni–W–5 g/l
SiC coating. (a) Presence of crystallographic texture (b) formation of continuous double barrier layer of
NiWO 4 and SiO 2
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| Publisher |
Elsevier
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| Date |
2016
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7592/1/Swarnima_Singh.pdf
Singh, Swarnima and Sribalaji, M. and Wasekar, Nitin P. and Joshi, Srikant and Sundararajan, G. and Singh, Raghuvir and Keshari, Anup Kumar (2016) Microstructural,phase evolution and corrosion properties of silicon carbide reinforced pulse electro deposited nickel–tungsten composite coatings. Applied Surface Science, 364 (3.150). pp. 264-272. |
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| Relation |
https://www.journals.elsevier.com/applied-surface-science/
http://eprints.nmlindia.org/7592/ |
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