Patent ID: 9228264
Filing Date: 2016-01-05
CPC Classification: C23C,F01D,Y02T,Y10T

Claim Text:
1. A process for protecting a metallic superalloy substrate against oxidation and hot corrosion, the process comprising depositing, on the metallic superalloy substrate, a first layer of aluminium and at least one element capable of being alloyed with sulphur by a vapour phase aluminization process, and depositing by chemical vapour deposition a second layer of a material that isolates said element capable of being alloyed with sulphur on the first layer, wherein the first layer forms a diffusion zone between the metallic superalloy substrate and the second layer with an interface zone between the first and second layers; and the vapour phase aluminization process is conducted so that the at least one element is alloyed with sulphur and has a concentration peak in the interface zone and coincides with a concentration peak of the sulphur at the interface zone.