HOT CORROSION BEHAVIORS OF AN ALUMINIDE COATED NICKEL BASE SUPERALLOY

Hot corrosion behaviors of a nickel base superalloy and aluminide diffusion coating have been studied under Na 2SO 4 and NaCl containing depesits at 900℃. The results demonstrated that both coated and uncoated specimens were not susceptible to the contents of NaCl in salts mixtures due to the formation of the Al 2O 3 scale on their surface.