Article including a substrate with a metallic coating and a protective coating thereon, its preparation and use in component restoration

摘要

A coated article has a metallic substrate (26) with a substrate composition, and a metallic coating (28) overlying and contacting the metallic substrate (26). The metallic coating (28) has a metallic-coating composition different from the substrate composition. A protective coating (30) overlies and contacts the metallic coating (28). The protective coating (30) includes an aluminide layer (32) overlying and contacting the metallic coating (28), and optionally a thermal barrier coating (36) overlying and contacting the aluminide layer (32). This structure may be used to restore a key dimension of an article that has previously been in service and to protect the article as well.