Corrosion coating for turbine blade environmental protection

Details Corrosion coating for turbine blade environmental protection Corrosion coating for turbine blade environmental protection

2006-02-21

2009-10-06

Speer, Timothy M (Department: 1794)

Coating processes

With post-treatment of coating or coating material

Heating or drying

C427S383300, C427S295000, C427S252000, C427S250000, C427S294000, C427S383700, C427S383100, C416S248000, C416S24100B, C416S24400R, C416S233000, C428S678000

Reexamination Certificate

active

07597934

ABSTRACT:
A method for making a gas turbine engine turbine blade comprising an airfoil section a platform section, an under platform section, and a dovetail section, the exterior surface of the dovetail section comprising a shank exterior surface and a serrated exterior surface. The blade further includes a silicon-modified diffusion aluminide layer a surface of a turbine blade section selected from the group consisting of the exterior surface of the under platform section, the exterior surface of the dovetail section, and combinations thereof, the aluminide layer having a concentration of silicon at a surface of the aluminide layer in the range of about 1 weight percent to about 10 weight percent and a concentration of aluminum at the surface of the aluminide layer in the range of about 5 weight percent to about 25 weight percent.

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Neff, Robert A., Katz, Gerald B., Nagaraj, B., and Tarvin, Rachel; Metallurgical Analysis of Rainbow Rotor Coatings: Analysis of Fleet Blades; American Society of Mechanical Engineers; Jun. 2004; pp. 1-11; International Gas Turbine Institute.

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