Premium
Corrosion behaviour in saline solution of pulsed‐electrodeposited zinc‐nickel‐ceria nanocomposite coatings
Author(s) -
Exbrayat L.,
Rébéré C.,
Ndong Eyame R.,
Steyer P.,
Creus J.
Publication year - 2017
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201709419
Subject(s) - materials science , corrosion , nanocomposite , electroplating , microstructure , sonication , metallurgy , zinc , nickel , nanoparticle , composite number , conversion coating , chemical engineering , composite material , layer (electronics) , nanotechnology , engineering
Pure Zn‐Ni and Zn–Ni–ceria (CeO 2 ) nanocomposite coatings were deposited onto steel substrates using pulse electrodeposition process from an acidic bath combined with preliminary sonication. Influences of different parameters such as pulse parameters, addition of nanoparticles in the electroplating bath, use of sonication to ensure their dispersion, were studied in terms of morphology, composition, and corrosion behaviour in saline solution. Results revealed a strong influence of the electrodeposition parameters on the corrosion behaviour of the Zn‐Ni coatings. Incorporation of ceria nanoparticles is enhanced for the very short duration of the pulse due to the refinement of the microstructure. It was proved that composite coatings present an enhanced corrosion behaviour, while sonification does not afford a further improvement.