ELECTROLYTE FOR ELECTROCHEMICAL MACHINING OF GAMMA-GAMMA PRIME NICKEL-BASED SUPERALLOYS

摘要

The present invention relates to an electrolyte for electrochemical machining of a γ-γ' nickel-based superalloy comprising - NaN0₃ at a content of between 10 and 50% by weight relative to the total weight of the electrolyte; - an additive chosen from the group consisting of KBr, NaBr, Kl, Nal and mixtures thereof, in particular KBr, in an additive/NaNCh molar ratio of between 1 and 15; - optionally an ethylenediaminetetraacetic acid-based complexing agent at a content of between 1 and 5% by weight relative to the total weight of the electrolyte at a pH of between 6 and 12; - optionally an anionic surfactant at a content of between 1 and 5% by weight relative to the total weight of the electrolyte; - optionally NaOH to obtain the appropriate pH; - an aqueous solvent. The invention further relates to the use of said electrolyte and a method for electrochemical machining of a γ-γ' nickel-based superalloy as well as a method for electrochemical machining of a γ-γ' nickel-based superalloy using said electrolyte.