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Abstract:
Microstructures, Surface morphology and composition of nanocrystalline Ni-Co alloy coating and Ni-Co/SiC nanocomposite coating synthesised by pulse electrodeposition have been studied by XRD, SEM and EDS. The corrosion characteristics of nanocrystalline Ni-Co alloy coating and NiCo/SiC nanocomposite coating were comparatively investigated by immersion corrosion test and electrochemical polarisation method respectively. The experimental results indicate that nanocrystalline Ni-Co alloy coatings and Ni-Co/SiC nanocomposite coatings can be synthesised by pulse electrodeposition. With introducing and increasing nano-SiC particles, the grain size of Ni-Co/SiC nanocomposite is being decreased while the microhardness is increasing. The Ni-Co/SiC nanocomposite coating exhibited better corrosion resistance in 3.5 wt-% NaCl solution and 5 wt-% HCl solution than nanocrystalline Ni-Co alloy. The surface morphology of all samples after corrosion in 3.5 wt-% NaCl solution show evidences of little corrosion. However, samples corroded in 5 wt-% HCl solution show uniform corrosion.
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SURFACE ENGINEERING
ISSN: 0267-0844
Year: 2011
Issue: 1
Volume: 27
Page: 71-76
0 . 9 3 7
JCR@2011
2 . 4 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 26
SCOPUS Cited Count: 32
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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