Method for selective surface protection of a gas turbine...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 28/02 (2006.01) C23C 10/04 (2006.01) C23C 10/28 (2006.01) C23C 14/16 (2006.01) C23G 1/02 (2006.01) C25D 3/50 (2006.01) C25D 5/02 (2006.01) F01D 5/12 (2006.01) F01D 5/28 (2006.01) C23F 11/18 (2006.01)

Patent

CA 2442460

A gas turbine blade (20) which has previously been in service is protected by cleaning the gas turbine blade (20), and then first depositing a platinum first layer on the airfoil (22) and the platform (28) of the gas turbine blade (20). Thereafter, a platinum second layer is deposited over the platform (28) but not the airfoil (22). A platinum- aluminide protective coating is formed by depositing an aluminum-containing layer (80) overlying both the platform (28) and the airfoil (22) and interdiffusing the platinum and the aluminum.

Une aube (20) de turbine à gaz qui a précédemment été en service est protégée par nettoyage, puis une première couche de platine est déposée sur le profil d'aile (22) et la plate-forme (28) de l'aube (20) de turbine à gaz. Ensuite, une deuxième couche de platine est déposée sur la plate- forme (28) mais non sur le profil d'aile (22). Un revêtement protecteur d'aluminiure de platine est formé par déposition d'une couche contenant de l'aluminium (80) sur la plate-forme (28) et le profil d'aile (22) et par interdiffusion du platine et de l'aluminium.

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