Coating processes – With post-treatment of coating or coating material – Heating or drying
Reexamination Certificate
2005-02-04
2010-11-02
Vinh, Lan (Department: 1713)
Coating processes
With post-treatment of coating or coating material
Heating or drying
C427S237000, C427S239000
Reexamination Certificate
active
07824738
ABSTRACT:
This invention relates to the simultaneous treatment of the internal and external surfaces of turbine blades or vanes. In particular it provides a process for coating an external and an internal surface of a turbine blade or vane with aluminium and chromium, respectively, at substantially the same time. The process comprises the following steps (i) and (ii) in either order: (i) applying to the external surface an aluminising compound comprising aluminium, a moderator, an energiser and a diluent; and (ii) applying to the internal surface a chromising compound comprising chromium, an energiser and a diluent. These steps are followed by (iii) heating the turbine blade or vane to form an aluminium layer on the external surface and a chromium layer on the internal surface. The invention also provides a suitable aluminising compound and a chromising compound per se.
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Chandra Sharad
Smith John
Angadi Maki A
Diffusion Alloys Limited
Man Turbo AG
McDermott Will & Emery LLP
Vinh Lan
LandOfFree
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