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2017-06-13 - Colloque/Présentation - communication orale - Anglais - 1 page(s)

Delaunois Fabienne , Bonin Luiza , Vitry Véronique , "Interest in composites formation to improve electroless nickel coatings properties." in World Congress on Advanced Materials WCAM2017, Xi'an, Chine, 2017

  • Codes CREF : Chimie des surfaces et des interfaces (DI1327), Tribologie (DI1269), Métallographie (DI2330), 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)
Texte intégral :

Abstract(s) :

(Anglais) Electroless nickel plating involves the deposition of a metallic-metalloid alloy layer on substrate by electrochemical reactions in aqueous solution without the need of external current. Electroless nickel deposits possess interesting properties such as uniform thickness, good adhesion, high hardness, wear resistance, good corrosion resistance. There are two major classes of electroless nickel coatings depending on the reducing agent used: nickel-phosphorous (Ni-P) and nickel-boron (Ni-B). Ni-B coatings are known to be smooth, hard and wear resistant, but have moderate corrosion resistance compared to Ni-P layers that are known to provide better corrosion resistance, but lower mechanical properties. The formation of duplex Ni-B/Ni-P coatings or multilayers Ni-B/Ni-P could be a good compromise for all those properties: Duplex coatings with a Ni-B layer at the top are the best candidate in as-plated conditions and multilayers coatings present better wear resistance than monolayers and good corrosion resistance with a medium hardness.

Notes :
  • (Anglais) Conférence invitée

Mots-clés :
  • (Anglais) corrosion
  • (Anglais) hardness
  • (Anglais) electroless nichel plating
  • (Anglais) multilayers
  • (Anglais) wear