Black nickel electrodeposition from a modified Watts bath

Ibrahim, Magdy,

Abstract


Black nickel coatings were electrodeposited on to steel substrates from a Watts bath containing potassium nitrate.
The best operating conditions necessary to produce smooth and highly adherent black nickel were found to be
NiSO4 Æ 6H2O 0.63 M, NiCl2 Æ 6H2O 0.09 M, H3BO3 0.3 M and KNO3 0.2 M at pH of 4.6, i=0.5 A dm)2, T=25 C
and t=10 min. The modified Watts bath has a throwing power (TP) of 61%, which is higher than that reported, not
only for nickel, but also for many other metals electrodeposited from different baths. The potentiostatic current–
time transients indicate instantaneous nucleation. X-ray diffraction (XRD) analysis shows that the black nickel
deposit is pure metallic nickel with Ni(111) preferred orientation.


Other data

Title Black nickel electrodeposition from a modified Watts bath
Authors Ibrahim, Magdy 
Keywords black nickel, current efficiency, electrodeposition, potentiodynamic, Tafel lines
Issue Date 2006
Publisher Elsevier
Journal Journal of Applied Electrochemistry 
URI http://research.asu.edu.eg/handle/123456789/169002
DOI DOI 10.1007/s10800-005-9077-8

Files in This Item:

File Description SizeFormat Existing users please Login
Black Nickel.pdf263.7 kBAdobe PDF    Request a copy
Recommend this item
Page have 12 view


Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.