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2021-06-11 - Colloque/Présentation - communication orale - Anglais - page(s)

Yunacti Muslum , Mégret Alexandre , Montagne Alex, Vitry Véronique , "Corrosion resistance of electroless NiB coatings synthesized in a bath free of stabilizing agent" in International Metallurgy and Materials congress, Istanbul/Virtual, Turquie, 2021

  • Codes CREF : Chimie des surfaces et des interfaces (DI1327), Tribologie (DI1269), 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) Electroless Nickel-Boron coatings present attractive properties in terms of mechanical, and corrosion resistance, as well as tribology. Therefore, they have been considered as outstanding alternatives to replace hard chromium coatings. There are several components in the plating solution, and one of them is a stabilizing agent, which is used to stabilize the plating bath and regulate the plating rate. However, toxic heavy metals such as Tl and Pb are employed as a stabilizing agent in the commercially available electroless NiB coating baths. Recent researches have allowed the development of new toxic-heavy-metals-free bath formulations, and one of them is a bath free of stabilizer. It was designed in our laboratory through the adjustment of the complexing agent and pH regulator concentration. The new coating exhibits properties close to those of the conventional electroless NiB coatings. However, the most remarkable feature of this new deposit composition is it’s much-improved corrosion resistance, which is the object of a thorough investigation in this work.

Mots-clés :
  • (Anglais) Electroless nickel, Ni-B coating, corrosion, environmentally friendly technology, stabilizers