NiP/SiC composite coatings

Célia de Fraga Malfatti (1) , Jane Zoppas Ferreira (1) , Cláudia Beatriz Dos Santos (1) , Bruna Vidor Souza (1) , Eduardo P. Fallavena (1) , Stéphane Vaillant (2) , Jean-Pierre Bonino (2)

1 UFRGS - Universidade Federal do Rio Grande do Sul [Porto Alegre]
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

NiP/SiC (17 at.% P) composite coatings were prepared by electrodeposition from a Brenner type plating bath containing SiC particles. Cyclic voltammetry and immersion time were used to evaluate the electrochemical behaviour of these coatings. The results showed that the presence of SiC particles in NiP alloy increased corrosion properties, because the exposed area of the metallic matrix was reduced due to its recovering by SiC particles. However, the current densities developed by the NiP/SiC composite coatings increased with increasing amount of incorporated particles, and such effect is more remarkable for small particles, after heat treatment and when the systems are polarized.

Mots clés: Metal matrix composites; Nickel; Cyclic voltammetry; Amorphous structures; Metal matrix composites

Domaines: Matériaux

Célia de Fraga Malfatti, Jane Zoppas Ferreira, Cláudia Beatriz Dos Santos, Bruna Vidor Souza, Eduardo P. Fallavena, et al.. NiP/SiC composite coatings: The effects of particles on the electrochemical behaviour. Corrosion Science, 2005, 47 (3), pp.567-580. ⟨10.1016/j.corsci.2004.07.011⟩. ⟨hal-03601351⟩