Removal chemistry going on a cover of a metal oxide of an article in a league 'superalloy

摘要

"Removal chemistry going on a cover of a metal oxide of an article in a league 'superalloy".A method for the removal of a virgin metal oxide covering a surface of a component of a gas turbine engines made in a league 'superalloy'.The component with the coverage of metal oxide applied is put in contact with an aqueous solution of the removal of coverage.Typically, containing by weight about 10 to 25% of an alkaline hydroxide, about 1 to 8% of a alcanolamina and about 0.5 - 5% salt of gluconate at a temperature of about 210 198 F (99 198 C).For a period of time sufficient to remove the cover article in oxide alloy 'superalloy' with the use of mechanical means smooth.The coverage of metal oxide may comprise one or more layers of oxide of metal, such as a layer of chromium oxide and a layer of aluminum oxide.