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AuthorTientong, J.
AuthorAhmad, Y.H.
AuthorNar, M.
AuthorD'Souza, N.
AuthorMohamed, A.M.A.
AuthorGolden, T.D.
Available date2016-03-06T14:12:57Z
Publication Date2014-05
Publication NameMaterials Chemistry and Physics
CitationTientong, J., Ahmad, Y.H., Nar, M., D'souza, N., Mohamed, A.M.A., Golden, T.D. "Improved mechanical and corrosion properties of nickel composite coatings by incorporation of layered silicates" (2014) Materials Chemistry and Physics, 145 (1-2), pp. 44-50.
AbstractLayered silicates as exfoliated montmorillonite are incorporated into nickel films by electrodeposition, enhancing both corrosion resistance and hardness. Films were deposited onto stainless steel from a plating solution adjusted to pH 9 containing nickel sulfate, sodium citrate, and various concentrations of exfoliated montmorillonite. The presence of the incorporated layered silicate was confirmed by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The composite films were also compact and smooth like the pure nickel films deposited under the same conditions as shown by scanning electron microscopy. X-ray diffraction results showed that incorporation of layered silicates into the film do not affect the nickel crystalline fcc structure. The nanocomposite films exhibited improved stability and adhesion. Pure nickel films cracked and peeled from the substrate when immersed in 3.5% NaCl solution within 5 days, while the nanocomposite films remained attached even after 25 days. The corrosion resistance of the nickel nanocomposites was also improved compared to nickel films. Nickel-layered silicate composites showed a 25% increase in Young's modulus and a 20% increase in hardness over pure nickel films.
SponsorNPRP grant 4-306-2-111 from the Qatar National Research Fund (A Member of The Qatar Foundation).
PublisherElsevier B.V.
SubjectComposite materials
SubjectElectrochemical techniques
TitleImproved mechanical and corrosion properties of nickel composite coatings by incorporation of layered silicates
Issue Number1
Volume Number145

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