METHOD FOR ANTI-CORROSION PROTECTION OF ENGINE BLADE AND TURBINE Russian patent published in 2022 - IPC C23C14/35 

FIELD: anti-corrosion protection.

SUBSTANCE: method for anti-corrosion protection of engine and turbine blades relates to the field of aircraft engine building and can be used to protect engine and turbine blades from high-temperature oxide-sulfide and gas corrosion. The method of applying an anticorrosive protective coating to the blades of engines and turbines includes ionic cleaning of the surface of parts in a vacuum, applying layers of the said coating by magnetron sputtering, and heat treatment of the coating from the deposited layers in a vacuum. A layer of silver is applied by magnetron sputtering, then a layer of zirconium and a layer of zirconium oxide. A layer of silver and a layer of zirconium are applied in an argon atmosphere at a pressure in the spraying chamber of 6.0⋅10^-1-7.0⋅10^-1 Pa. The silver layer is applied at the following operating parameters of the direct current source: I=0.20-0.22 A, U=0.66-0.68 kV until the formation of the thickness of the mentioned layer is 15-25 mcm. A layer of zirconium is applied at operating parameters of a direct current source: I=0.51-0.53 A, U=0.34-0.36 kV until the formation of the thickness of the specified layer is 10-15 mcm. A layer of zirconium oxide is applied in an environment of argon and oxygen in a volume ratio of 1:1 at the operating parameters of a high-frequency current source: U=60-62 V until the formation of the thickness of the said layer of 10-15 mcm. Heat treatment of the coating from the applied layers in vacuum is carried out at a temperature of 1000-1050°С for 3-4 hours.

EFFECT: increased chemical resistance of the coating of engine and turbine blades to high-temperature gas corrosion.

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