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Corrosion stability of Zn-Co alloys deposited from baths with high and low Co content - The influence of deposition current density

Authorized Users Only
2010
Authors
Bajat, Jelena
Stanković, S.
Jokić, Bojan
Stevanović, Sanja
Article (Published version)
Metadata
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Abstract
Electrochemically deposited Zn-Co alloys under various deposition conditions were investigated using atomic absorption spectroscopy (AAS) for determination of chemical composition, anodic linear sweep voltammetry (ALSV) and X-ray diffraction (XRD) for phase structure determination, SEM and AFM for surface morphology analysis, and polarization measurements for determination of corrosion properties. The influence of deposition current density and composition of deposition solution on the phase structure, morphology and corrosion properties of Zn-Co alloys were studied. The plating baths used were with low metal concentration, free of additives and deposition was carried out at room temperature, since the aim of the work was to investigate only the influence of different deposition current densities using economically favorable deposition parameters. It was shown that the ratio of cobalt to zinc ions in the plating bath strongly affects the chemical content and phase structure, as well as... the morphology and corrosion stability, of Zn-Co alloys. The single-phased Zn-Co alloys showed the best corrosion stability. The alloys deposited at the highest current density from plating bath with the lower ratio of cobalt to zinc ions, as well as the one deposited at the intermediate current density from bath with higher ratio of cobalt to zinc ions, exhibited the lowest corrosion rates. It was also shown that the deposit having smaller crystallite grains (obtained at higher current density), among two alloy deposits having the same chemical content and phase structure, yielded lower corrosion rate.

Keywords:
Corrosion / AFM / SEM / X-ray diffraction / Electroplating / Zinc alloy
Source:
Surface & Coatings Technology, 2010, 204, 16-17, 2745-2753
Publisher:
  • Elsevier Science Sa, Lausanne
Funding / projects:
  • Elektrohemijske karakteristike oksidnih i polimernih prevlaka na modifikovanim površinama metala (RS-142061)

DOI: 10.1016/j.surfcoat.2010.02.032

ISSN: 0257-8972

WoS: 000277736100031

Scopus: 2-s2.0-77951298055
[ Google Scholar ]
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29
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1697
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Bajat, Jelena
AU  - Stanković, S.
AU  - Jokić, Bojan
AU  - Stevanović, Sanja
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1697
AB  - Electrochemically deposited Zn-Co alloys under various deposition conditions were investigated using atomic absorption spectroscopy (AAS) for determination of chemical composition, anodic linear sweep voltammetry (ALSV) and X-ray diffraction (XRD) for phase structure determination, SEM and AFM for surface morphology analysis, and polarization measurements for determination of corrosion properties. The influence of deposition current density and composition of deposition solution on the phase structure, morphology and corrosion properties of Zn-Co alloys were studied. The plating baths used were with low metal concentration, free of additives and deposition was carried out at room temperature, since the aim of the work was to investigate only the influence of different deposition current densities using economically favorable deposition parameters. It was shown that the ratio of cobalt to zinc ions in the plating bath strongly affects the chemical content and phase structure, as well as the morphology and corrosion stability, of Zn-Co alloys. The single-phased Zn-Co alloys showed the best corrosion stability. The alloys deposited at the highest current density from plating bath with the lower ratio of cobalt to zinc ions, as well as the one deposited at the intermediate current density from bath with higher ratio of cobalt to zinc ions, exhibited the lowest corrosion rates. It was also shown that the deposit having smaller crystallite grains (obtained at higher current density), among two alloy deposits having the same chemical content and phase structure, yielded lower corrosion rate.
PB  - Elsevier Science Sa, Lausanne
T2  - Surface & Coatings Technology
T1  - Corrosion stability of Zn-Co alloys deposited from baths with high and low Co content - The influence of deposition current density
EP  - 2753
IS  - 16-17
SP  - 2745
VL  - 204
DO  - 10.1016/j.surfcoat.2010.02.032
ER  - 
@article{
author = "Bajat, Jelena and Stanković, S. and Jokić, Bojan and Stevanović, Sanja",
year = "2010",
abstract = "Electrochemically deposited Zn-Co alloys under various deposition conditions were investigated using atomic absorption spectroscopy (AAS) for determination of chemical composition, anodic linear sweep voltammetry (ALSV) and X-ray diffraction (XRD) for phase structure determination, SEM and AFM for surface morphology analysis, and polarization measurements for determination of corrosion properties. The influence of deposition current density and composition of deposition solution on the phase structure, morphology and corrosion properties of Zn-Co alloys were studied. The plating baths used were with low metal concentration, free of additives and deposition was carried out at room temperature, since the aim of the work was to investigate only the influence of different deposition current densities using economically favorable deposition parameters. It was shown that the ratio of cobalt to zinc ions in the plating bath strongly affects the chemical content and phase structure, as well as the morphology and corrosion stability, of Zn-Co alloys. The single-phased Zn-Co alloys showed the best corrosion stability. The alloys deposited at the highest current density from plating bath with the lower ratio of cobalt to zinc ions, as well as the one deposited at the intermediate current density from bath with higher ratio of cobalt to zinc ions, exhibited the lowest corrosion rates. It was also shown that the deposit having smaller crystallite grains (obtained at higher current density), among two alloy deposits having the same chemical content and phase structure, yielded lower corrosion rate.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Surface & Coatings Technology",
title = "Corrosion stability of Zn-Co alloys deposited from baths with high and low Co content - The influence of deposition current density",
pages = "2753-2745",
number = "16-17",
volume = "204",
doi = "10.1016/j.surfcoat.2010.02.032"
}
Bajat, J., Stanković, S., Jokić, B.,& Stevanović, S.. (2010). Corrosion stability of Zn-Co alloys deposited from baths with high and low Co content - The influence of deposition current density. in Surface & Coatings Technology
Elsevier Science Sa, Lausanne., 204(16-17), 2745-2753.
https://doi.org/10.1016/j.surfcoat.2010.02.032
Bajat J, Stanković S, Jokić B, Stevanović S. Corrosion stability of Zn-Co alloys deposited from baths with high and low Co content - The influence of deposition current density. in Surface & Coatings Technology. 2010;204(16-17):2745-2753.
doi:10.1016/j.surfcoat.2010.02.032 .
Bajat, Jelena, Stanković, S., Jokić, Bojan, Stevanović, Sanja, "Corrosion stability of Zn-Co alloys deposited from baths with high and low Co content - The influence of deposition current density" in Surface & Coatings Technology, 204, no. 16-17 (2010):2745-2753,
https://doi.org/10.1016/j.surfcoat.2010.02.032 . .

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