Coating processes – Restoring or repairing – Metal article
Patent
1988-12-22
1990-10-23
Childs, Sadie
Coating processes
Restoring or repairing
Metal article
134 2, 427252, 427328, 427343, B32B 3500
Patent
active
049650955
ABSTRACT:
Workpieces are very rapidly diffusion coated by heating the packed workpiece at a rate that brings the workpiece to diffusion-coating temperature and then completing the diffusion coating, all in less than 50 minutes, then cooling. Workpiece can have top coating layer of aluminum flake covered by a layer of extremely fine alumina or silica in a magnesium chromate binder, to provide surface having roughness at least about 10 micro-inches smoother than before the top coating. Used aluminized jet engine hot section members can be reconditioned by a fluoridizing treatment that deoxidizes and also removes residual aluminizing, so that the members can then be repaired if necessary and re-aluminized.
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Alloy Surfaces Company, Inc.
Childs Sadie
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