Electrodeposition of cobalt from gluconate electrolyte
Ibrahim, Magdy; M.M. DANKERIA; S.S. ABD EL REHIM;
Abstract
Cobalt electrodeposited onto steel substrate was carried out from solutions containing cobalt sulfate, boric acid and
sodium gluconate. The study dealt with the influence of bath composition, current density, pH and temperature on
the potentiodynamic cathodic polarization curves, cathodic current efficiency, and throwing power, as well as the
throwing index of these baths. The microhardness of cobalt electrodeposited from gluconate baths is generally high
and higher than that of cobalt deposited under similar conditions from sulfate, chloride, bromide and acetate baths.
The surface morphology of the as-deposited cobalt was investigated using scanning electron microscopy (SEM)
while the structure was studied using X-ray diffraction analysis. Cyclic voltammetric, as well as current-transient,
techniques recorded on a glassy carbon electrode suggested that the deposition of cobalt from gluconate bath occurs
via a nucleation process under charge transfer control.
sodium gluconate. The study dealt with the influence of bath composition, current density, pH and temperature on
the potentiodynamic cathodic polarization curves, cathodic current efficiency, and throwing power, as well as the
throwing index of these baths. The microhardness of cobalt electrodeposited from gluconate baths is generally high
and higher than that of cobalt deposited under similar conditions from sulfate, chloride, bromide and acetate baths.
The surface morphology of the as-deposited cobalt was investigated using scanning electron microscopy (SEM)
while the structure was studied using X-ray diffraction analysis. Cyclic voltammetric, as well as current-transient,
techniques recorded on a glassy carbon electrode suggested that the deposition of cobalt from gluconate bath occurs
via a nucleation process under charge transfer control.
Other data
Title | Electrodeposition of cobalt from gluconate electrolyte | Authors | Ibrahim, Magdy ; M.M. DANKERIA ; S.S. ABD EL REHIM | Keywords | hronoamperometry, cobalt deposition, current efficiency, microhardness, morphology, potentiodynamic, throwing power | Issue Date | 2002 | Publisher | Springer | Journal | Journal of Applied Electrochemistry |
Attached Files
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
Cogluconate.pdf | 350.92 kB | Adobe PDF | Request a copy |
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.