Granted Patent B2

US 12,584,627 · App. 18/192,463 · Granted Mar 24, 2026

Inventors: Maria José Landeira Østergård (Virum, DK); Alina Agüero Bruna (Torrejón de Ardoz, ES); Marcos Gutiérrez Del Olmo (Torrejón de Ardoz, ES); Søren Gyde Thomsen (Kgs. Lyngby, DK)

Assignees: Topsoe A/S; National Institute for Aerospace Technology (INTA)

F23D14/24C23C12/00F23D14/58F23D2212/20F23D2213/00

Abstract

Claims (6)

1 . A Ni-based alloy coated with a chromium (Cr) free silicate-based nickel aluminide water based slurry diffusion coating, wherein a 10-1000 μm thick silicate-based Al containing slurry is applied on the Ni-based alloy, followed by heat treatment of the applied silicate-based Al containing slurry, wherein the heat treatment is performed in a reducing atmosphere of 80-100% Argon and 0-20% Hydrogen.

2 . The Ni-based alloy coated with a chromium (Cr) free silicate-based nickel aluminide water based slurry diffusion coating of claim 1 , wherein the Ni-based alloy is coated by slurry spray, paint brush or immersion.

3 . A method for production of a chromium (Cr) free silicate-based nickel aluminide water based slurry diffusion coating on a Ni-based alloy for protection against high temperature corrosion caused by metal dusting, the method comprising the steps of:

applying a 10-1000 μm thick chromium free silicate-based nickel Al containing water based slurry on the Ni-based alloy; and

heat treating the Ni-based alloy with the applied chromium free silicate-based nickel Al containing slurry in a reducing atmosphere of 80-100% Argon and 0-20% Hydrogen.

4 . The method of claim 3 , wherein the Ni-based alloy is coated by slurry spray, paint brush, or immersion.

Priority Claims (1)

Continuity (2)

References Cited (47)