Caustic process for replacing a thermal barrier coating

Coating processes – Restoring or repairing – Metal article

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298891, B05D 310

Patent

active

061466921

ABSTRACT:
An aqueous caustic process can be used for replacing a thermal barrier coating on a metal surface. In the process, the metal surface is contacted with a caustic solution to remove the thermal barrier coating. The processing conditions for contacting the caustic solution are selected to avoid the formation of a peel layer during a subsequent application of a replacement thermal barrier coating and heat treatment. A replacement thermal barrier coating is then reapplied to the metal surface.

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"New Method for Turbine Blade Internal Cleaning", by J. D. Irvine et al., presented at the International Gas Turbine and Aeroengine Congress and Exposition, Houston, TX, Jun. 5-8, 1995.

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