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Surface quality of the Ni-TiO2 Composite coatings produced by electroplating (CROSBI ID 247284)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Stanković, Velizar ; Gojo, Miroslav ; Grekulović, Vesna ; Pajkić, Ninoslav ; Cigula, Tomislav Surface quality of the Ni-TiO2 Composite coatings produced by electroplating // Journal of mining and metallurgy. Section: B, Metallurgy, 53 (2017), 3; 341-348. doi: 10.2298/JMMB170524042S

Podaci o odgovornosti

Stanković, Velizar ; Gojo, Miroslav ; Grekulović, Vesna ; Pajkić, Ninoslav ; Cigula, Tomislav

engleski

Surface quality of the Ni-TiO2 Composite coatings produced by electroplating

Composite nickel coatings on a brass substrate were produced from suspensions consisted of a conventional nickel sulphate bath and fine TiO2 particles (dp < 0.35 µm). Characterization of coatings surface was performed by using optical and SEM micrographs, by EDS analysis and by determining the surface roughness parameters. Metallographic analysis has also been done in order to get an insight about particles distribution throughout the thickness of the coating layer. Presence of TiO2 particles in electrodeposited metal affected the surface morphology. Particles were embedded as smaller or bigger agglomerates within the coatings, as well as the individual particles. Metallographic analysis showed uniform distribution of particles and their agglomerates within the coating. Surface roughness parameters of the composites have had up to 35 times higher values than the ones of the pure nickel coatings. Roughness maxima appeared at the concentration of particles between 10 and 20 g dm-3. Then it drops down and remains constant for concentrations > 40 gdm-3. SEM micrographs showed irregularities like single-nodule, or beads of nodules on the surface. Relationship between surface roughness and current density has not been noted.

Nickel electroplating ; TiO2 particles ; Composite coatings ; Surface roughness ; Surface profilograms

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Podaci o izdanju

53 (3)

2017.

341-348

objavljeno

1450-5339

2217-7175

10.2298/JMMB170524042S

Povezanost rada

Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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