Method for protecting the surface of an intermetallic alloy substrate with a titanium-aluminide base against corrosion

摘要

the method of the invention includes the following steps:(a) preparing a substrate formed of intermetallic alloy.(b) depositing a coating on the surface of gold to protect the substrate.(c) to provide the substrate with gold coating and annealing under controlled conditions to produce a limited distribution of gold in the area to be protected. the invention applies in particular to the gas turbine components, such as parts of aircraft engines.