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Title | Corrosion resistance of AZ91 magnesium alloy with pulse electrodeposited Ni-SiC nanocomposite coating |
Authors |
Hajiali Fini, М.
Amadeh, A. |
ORCID | |
Keywords |
nanocomposite coating pulse electrodeposition SiC Concentration corrosion micro-hardness |
Type | Conference Papers |
Date of Issue | 2011 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/20604 |
Publisher | Sumy State University |
License | Copyright not evaluated |
Citation | Hajiali, Fini М. Corrosion resistance of AZ91 magnesium alloy with pulse electrodeposited Ni-SiC nanocomposite coating [Текст] / F.М. Hajiali, А. Amadeh // Nanomaterials: applications & properties. Proceedings: 1-st International conference, Alushta, Crimea, 27-30 Semptember 2011 / Edited by: A. Pogrebnjak, T. Lyutyy, S. Protsenko. - Sumy: Sumy State University, 2011. - V.1, P.І. - C. 141-144. |
Abstract |
Magnesium and its alloys are the lightest of the structural metals, which makes
them one of the most promising materials to minimize vehicle weight, but poor surface
properties restrict the application of these alloys. In this paper, Ni-SiC nanocomposite
coatings were applied on AZ91 magnesium alloy from Watts bath with SiC content 0
g.L-1 (pure Ni), 10 g.L-1 (Ni-10SiC) and 15 g.L-1 (Ni-15SiC) by application of pulse
electrodeposition technique. The morphology and phase analysis were carried out by
Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) analysis, respectively.
Micro-hardness of specimens was measured and the results revealed a significant
enhancement: from 74 Vickers for bare AZ91 magnesium alloy to 523 Vickers for
coated specimen in the bath containing 15 g.L-1 SiC. The Corrosion behavior of the
samples was studied by potentiodaynamic polarization, and the obtained data showed
the superior corrosion resistance for the coated AZ91 magnesium alloy, i.e. the corrosion
current density decreased from 2.69 mA.cm-2, for the uncoated sample, to 0.00046
mA.cm-2, for coated specimen in the bath containing 15 g.L-1 SiC and the corrosion
potential increased from -2.069 V to -0.33 V for the same conditions. |
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Hajiali_Fini_Amadeh_Corrosion_resistance.pdf | 433.95 kB | Adobe PDF | 371916776 |
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