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REVISTA DE CHIMIE
Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2013, Volume 64, Issue 4,





Ana Maria Popescu, Virgil Constantin, Mircea Olteanu, Vasile Soare, Marian Burada, Elena Ionela Neacsu
Morphology and Corrosion Behaviour of Zn-Ni-P Thin Films
Electrolessly Deposited from Chloride Baths

Abstract:

Electroless Zn-Ni-P thin film alloys deposits on steel substrate from chloride bath (ZnCl2, NiCl2) containing ammonium chloride as a buffer agent and sodium citrate as a complexing agent were investigated. The effects of deposition conditions (temperature, bath composition, time) on the final deposit composition were studied. It was found that the percentages of zinc and phosphorus in the obtained Zn-Ni-P alloys never reach high values. Some physical characteristics such as morphology and corrosion properties of Zn-Ni-P coatings were assessed. Corrosion tests were done in 3.5 wt.% sodium chloride aerated solution. Corrosion rate values were determined to be 0.1283-0.0297 mm·year-1 comparative to 0.2104 mm·year-1 for the uncoated steel substrate.The surface analysis of the thin film samples before / after corrosion was performed by X-ray photoelectron spectroscopy (XPS) in an attempt to understand the chemistry of the obtained thin films. Keywords: Zn-Ni-P thin films, electroless deposition, corrosion; morphology, XPS spectra

Issue: 2013, Volume 64, Issue 4
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