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AuthorYusuf M.M.
AuthorRadwan A.B.
AuthorShakoor R.A.
AuthorAwais M.
AuthorAbdullah A.M.
AuthorMontemor M.F.
AuthorKahraman R.
Available date2019-11-04T05:19:29Z
Publication Date2018
Publication NameJournal of Applied Electrochemistry
ResourceScopus
ISSN0021-891X
URIhttp://dx.doi.org/10.1007/s10800-018-1168-4
URIhttp://hdl.handle.net/10576/12274
AbstractAbstract: Binary (Ni–B, Ni–P) and duplex coatings (Ni–B/Ni–P, Ni–B/Ni–P–CeO2) with an inner Ni–B layer were electrodeposited on mild steel substrates. A comparison of the structural, surface, mechanical, and electrochemical properties of the coatings is presented to demonstrate the mechanical behaviour and corrosion protection performance. Scanning electron microscope and atomic force microscope images showed that Ni–B/Ni–P–CeO2 duplex coatings had a well-defined nodular structure compared to Ni–P coatings, and fewer surface defects compared to Ni–B and Ni–B/Ni–P duplex coatings. However, these coatings had high surface roughness owing to the presence of CeO2 ceramic particles. X-ray diffraction analysis revealed that Ni–B coatings were crystalline but Ni–P and Ni–B/Ni–P–CeO2 coatings exhibited an amorphous structure. Ni–B/Ni–P–CeO2 coatings exhibited superior hardness (15%) compared to Ni–P and Ni–B/Ni–P duplex coatings. Potentiodynamic polarisation results confirmed that Ni–B/Ni–P–CeO2 duplex coatings had superior corrosion protection efficiency (91%) compared to Ni–B (30%) and duplex Ni–B/Ni–P coatings (77%). The novel Ni–B/Ni–P–CeO2 duplex coatings demonstrated superior mechanical and promising anti-corrosion properties, which render them attractive for various applications. Graphical Abstract: [Figure not available: see fulltext.]. © 2018, Springer Science+Business Media B.V., part of Springer Nature.
SponsorAcknowledgements This publication was made possible by NPRP Grant # 9-080-2-039 from the Qatar National Research Fund (a member of the Qatar Foundation). Statements made herein are solely the responsibility of the authors. M.F. Montemor acknowledges Fundaç?o para a Ciência e Tecnologia (FCT) for the funding under the contract UID/QUI/00100/2013.
Languageen
PublisherSpringer Netherlands
SubjectCorrosion protection
Crystal structure
Duplex coatings
Electrodeposition
Hardness
Nanocomposites
TitleSynthesis and characterisation of Ni–B/Ni–P–CeO2 duplex composite coatings
TypeArticle
Pagination391-404
Issue Number4
Volume Number48
dc.accessType Abstract Only


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