Patent ID: 7758914
Filing Date: 2010-07-20
Classification: B05D,C23C,Y02T,Y10T

Abstract:
1. A method of repairing a coating forming a thermal barrier on a superalloy substrate, wherein said coating to be repaired is a ClA coating obtained by prior deposition of chromium onto the superalloy substrate followed by a step of vapor aluminizing onto the chromium, and wherein the following steps are carried out in a zone or zones of the coating to be repaired: a) completely removing a spoilt coating down to the superalloy substrate; b) forming a pre-layer on the superalloy substrate by applying one or more layers of a paint containing at least one metal selected from the group consisting of platinum class metals (platinoids) and chromium; and c) vapor aluminizing onto the pre-layer, to obtain an aluminide of said at least one metal.