Electrodeposition of Duplex Ni–B–Zn/Co Composite Coatings

This research article focusses on the Ni–B–Zn/Co composite coatings synthesized via an electrodeposition process. Electrodeposited Ni–B composite coatings have several advantages, such as excellent corrosion as well as wear resistance and high hardness in the as-deposited condition. We studied the i...

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Bibliographic Details
Published in:JOM (1989) 2020-12, Vol.72 (12), p.4296-4304
Main Authors: Walunj, Ganesh, Waware, Umesh Somaji, Hamouda, A. M. S., Borkar, Tushar
Format: Article
Language:English
Subjects:
Advances in Surface Engineering
Alloys
Boron
Chemistry/Food Science
Coated electrodes
Cobalt
Corrosion resistance
Corrosive wear
Earth Sciences
Electrodeposition
Electrodes
Engineering
Environment
Grain refinement
Grain size
Investigations
Mechanical properties
Microhardness
Modulus of elasticity
Nickel
Physics
Protective coatings
Scanning electron microscopy
Spectrum analysis
Steel
Wear resistance
Zinc
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Summary:This research article focusses on the Ni–B–Zn/Co composite coatings synthesized via an electrodeposition process. Electrodeposited Ni–B composite coatings have several advantages, such as excellent corrosion as well as wear resistance and high hardness in the as-deposited condition. We studied the influence of Zn/Co addition on microstructure, phase evolution, mechanical (hardness and wear resistance), and corrosion behavior of electrodeposited Ni–B–Zn/Co composite coatings. The Ni–B–Zn/Co composite coatings exhibited significant improvements in microhardness (by 90%) as well as in elastic modulus (by 100%) in comparison with electrodeposited Ni–B coatings. Both scanning electron microscopy (SEM) and x-ray diffraction (XRD) analyses showed significant improvement in grain sizes in Ni–B–Zn/Co composite coatings compared with Ni–B coatings. This grain refinement in composite coatings is primarily attributed to the addition as well as uniform dispersion of Zn/Co within the Ni–B matrix. The Ni–B–Zn/Co coatings exhibited far better corrosion resistance and mechanical properties than Ni–B coatings.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-020-04247-9