METHOD OF PRODUCING PROTECTIVE COATING ON SURFACE OF PART FROM NICKEL ALLOY Russian patent published in 2019 - IPC C23C26/00 C23C8/10 C22F1/10 

FIELD: chemistry.

SUBSTANCE: invention relates to production of a protective coating, which protects against the action of aggressive media of the surface of parts of flow part of turbines of turbo-pump units of liquid-propellant rocket engines (LPE) made of nickel alloys and having a complex configuration. Method of obtaining on surface of part from nickel alloy of protective coating, consisting of oxides of alloying elements of nickel alloy, includes hot isostatic pressing (HIP) of part at pressure of 150 MPa, at temperature of 1190 °C and holding time 3 hours in argon medium with 0.002 % volume fraction of oxygen. Partial pressure of oxygen is set lower than the pressure of dissociation of nickel oxide and higher than the pressure of dissociation of said oxides of alloying elements. Then aging is carried out at temperature 900 °C and holding time of 16 hours and cooling in air.

EFFECT: reliable protection from parts in the medium of high-temperature oxygen-containing generator gas and resistance to corrosion of particles which initiate ignition.

1 cl, 1 ex