Method of making a gas turbine blade having a duplex coating

Details Method of making a gas turbine blade having a duplex coating Method of making a gas turbine blade having a duplex coating

1992-08-20

1993-11-09

Owens, Terry J.

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

4273762, 4273765, 427380, 4273837, B05D 312

Patent

active

052600998

ABSTRACT:
A stainless steel gas turbine engine compressor blade is protected against corrosion by providing a thin sacrificial coating in the form of a coherent aluminum body in electrically-conducting contact with the blade surface, then overcoating the aluminum coat with a phosphate-chromate mixture in organic vehicle and drying and heating to cure and repeating the overcoating step several times to harden and densify the resulting ceramic body.

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