DI-UMONS : Dépôt institutionnel de l’université de Mons

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2017-09-07 - Colloque/Présentation - communication orale - Anglais - 1 page(s)

Vitry Véronique , Bonin Luiza , Bains Narinder, Cobley Andrew, "Corrosion behaviour of ultrasound assisted electroless nickel-boron coatings." in EUROCORR2017, Pragues, République tchèque, 2017

  • Codes CREF : Chimie des surfaces et des interfaces (DI1327), Chimie des solides (DI1316), Electrochimie hautes et basses températures (DI1326), Corrosion des matériaux (DI2114)
  • Unités de recherche UMONS : Métallurgie (F601)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Ingénierie des matériaux (CRIM)

Abstract(s) :

(Anglais) The effect of ultrasound on the corrosion properties of Nickel-Boron (NiB) coatings was investigated. Ultrasonic or mechanical agitation were used to produce NiB coatings. Nickel deposition reduced by sodium borohydride was performed in three different configurations: one with a classical mechanical agitation at 300 rpm and the other two employing ultrasound at a frequency of either 20 or 35 kHz. The coatings microstructures were characterized by a Scanning Electron Microscope (SEM) before and after potentiodynamic polarization. Bio-logic SP-50 equipment was used in this study to obtain potentiodynamic polarization curves in 0.1M NaCl solution. The main advantage observed with ultrasonic agitation was a significant increase of the plating rate. In addition, significant differences in pitting potential are observable on the polarization curves and beneficial effects of ultrasound assistance can be seen.

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