Evaluation of the Compatibility of Aluminide Coatings in High-Temperature Sodium for Fast Reactor Application

Fabien Rouillard (1, 2) , Jean-Louis Courouau (2, 1) , Brigitte Duprey (1, 2) , Stéphane Mathieu (3) , Michel Vilasi (3) , Younès Bouizi (3) , Germain Boissonnet (4) , Fernando Pedraza (4) , Ingrid Proriol-Serre (5)

1 SCCME - Service de la Corrosion et du Comportement des Matériaux dans leur Environnement
2 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)
3 IJL - Institut Jean Lamour
4 LaSIE - Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356
5 UMET - Unité Matériaux et Transformations - UMR 8207

Nickel and iron aluminide coatings were identified as possible candidates for hardfacing materials in Sodium Fast Reactors. Both coatings were developed on two steel grades of interest for the next French Sodium Fast Reactor prototype, 316L(N) and T91. Pack cementation and slurry were employed as aluminization processes. The compatibility of all coatings with purified Na was evaluated at 550 A degrees C for exposure times up to 4250 h. All coatings evidenced high chemical stability in Na even though Na penetration and slow coating dissolution could be evidenced. The penetration depth of Na was observed to depend on the coating nature induced by the deposition process.

Mots clés: ords:Sodium; Coatings; Aluminides; Hardfacing

Domaines: Matériaux

Fabien Rouillard, Jean-Louis Courouau, Brigitte Duprey, Stéphane Mathieu, Michel Vilasi, et al.. Evaluation of the Compatibility of Aluminide Coatings in High-Temperature Sodium for Fast Reactor Application. Oxidation of Metals, 2017, 88 (1-2), pp.221-233. ⟨10.1007/s11085-016-9689-x⟩. ⟨hal-02489025⟩