Electroplating of Cobalt from Aqueous Citrate Baths
Sayed S. Abd El Rehim; Saad M. Abd El Wahaab; Ibrahim, Magdy; Marwan M. Dankeria;
Abstract
Electroplating of cobalt onto steel substrates from citrate baths has
been investigated under di erent conditions of bath composition, current density,
pH and temperature. A detailed study has been made of the inÑuence of these
variables on the potentiodynamic cathodic polarization curves, cathodic current
efficiency and the throwing power as well as the throwing index of these baths.
The optimum bath composition has been established and it contains :
CoSO (0É36 mol dm~3) trisodium citrate (0É19 mol dm~3) and citric 4 . 7H2O
acid (0É1 mol dm~3) at pH 5É0. The microhardness of cobalt electrodeposited
from citrate baths is high and it may be, under certain conditions, two or three
times higher than that reported for cobalt electrodeposited from other di erent
baths. The surface morphology of the as-plated cobalt was investigated by using
scanning electron microscopy (SEM) while the structure was studied by using
X-ray di raction analysis and anodic stripping voltammetry (ASV) techniques.
been investigated under di erent conditions of bath composition, current density,
pH and temperature. A detailed study has been made of the inÑuence of these
variables on the potentiodynamic cathodic polarization curves, cathodic current
efficiency and the throwing power as well as the throwing index of these baths.
The optimum bath composition has been established and it contains :
CoSO (0É36 mol dm~3) trisodium citrate (0É19 mol dm~3) and citric 4 . 7H2O
acid (0É1 mol dm~3) at pH 5É0. The microhardness of cobalt electrodeposited
from citrate baths is high and it may be, under certain conditions, two or three
times higher than that reported for cobalt electrodeposited from other di erent
baths. The surface morphology of the as-plated cobalt was investigated by using
scanning electron microscopy (SEM) while the structure was studied by using
X-ray di raction analysis and anodic stripping voltammetry (ASV) techniques.
Other data
Title | Electroplating of Cobalt from Aqueous Citrate Baths | Authors | Sayed S. Abd El Rehim ; Saad M. Abd El Wahaab ; Ibrahim, Magdy ; Marwan M. Dankeria | Keywords | electroplating ; cobalt ; citrate baths | Issue Date | 1998 | Publisher | Society of Chemical Industry | Journal | J. Chem. Technol. Biotechnol. |
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