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The production of nickel–alumina composite coating via electroplating

The production of nickel–alumina composite coating via electroplating A series of electroplating works have been conducted to investigate the best condition for the coelectrodeposition of nickel–alumina (Ni/α–Al2O3) composite coating. Co-electrodeposition was done onto mild steel as cathode at ambient temperature (27°C) with current density of 30 mA/cm2 under α-Al2O3 concentration of 2 g/l and various agitation speeds of 50, 100, 150, 200, and 250 rpms. The cross-section of the composite coatings portrayed α-Al2O3 particles was co-deposited. Under field emission scanning electron microscopy analysis, the coating shows a coarse surface morphology, while cross-sectional microstructures shows a compact embedding of α-Al2O3 particle in the Ni matrix. Elemental analysis by EDX detected the presence of Ni and α-Al2O3. Vickers microhardness testing shows that the coating hardness increases almost 60% at the highest agitation speed, i.e., 250 rpm. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

The production of nickel–alumina composite coating via electroplating

Badarulzaman, N.; Purwadaria, S.; Mohamad, A.; Ahmad, Z.
Ionics , Volume 15 (5) – Dec 4, 2008
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References (11)

Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer-Verlag
Subject
Chemistry; Condensed Matter Physics; Optical and Electronic Materials; Renewable and Green Energy; Electrochemistry
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-008-0307-z
Publisher site
See Article on Publisher Site

Abstract

A series of electroplating works have been conducted to investigate the best condition for the coelectrodeposition of nickel–alumina (Ni/α–Al2O3) composite coating. Co-electrodeposition was done onto mild steel as cathode at ambient temperature (27°C) with current density of 30 mA/cm2 under α-Al2O3 concentration of 2 g/l and various agitation speeds of 50, 100, 150, 200, and 250 rpms. The cross-section of the composite coatings portrayed α-Al2O3 particles was co-deposited. Under field emission scanning electron microscopy analysis, the coating shows a coarse surface morphology, while cross-sectional microstructures shows a compact embedding of α-Al2O3 particle in the Ni matrix. Elemental analysis by EDX detected the presence of Ni and α-Al2O3. Vickers microhardness testing shows that the coating hardness increases almost 60% at the highest agitation speed, i.e., 250 rpm.

Journal

Ionics – Springer Journals

Published: Dec 4, 2008

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