METHOD FOR PRODUCING COATING ON INNER SURFACE OF HOLLOW PART USING ELECTRICAL EXPLOSION OF CONDUCTOR Russian patent published in 2023 - IPC C23C4/126 C23C4/08 

FIELD: coatings.

SUBSTANCE: invention relates to a method for producing a coating on the inner surface of a hollow part using an electrical explosion of a conductor. Ultrasonic treatment of the inner surface of the hollow part is carried out with a waveguide tip through an abrasive suspension at an oscillation frequency of 25-26 kHz, an amplitude of 20-60 mcm and a linear speed of movement of the waveguide tip of 0.5⋅10^-3-1⋅10^-3 m/min, followed by degreasing and etching of the processed inner surface of the hollow part. An electric explosion of the conductor is carried out with the products of the electric explosion of the conductor being applied in the form of a layer of the resulting coating on the inner surface of the hollow part. Subsequent ultrasonic treatment is carried out with a strengthening element in the form of a waveguide tip, deforming the surface of the mentioned applied layer, simultaneously with the passage of high-frequency pulsed current discharges with a frequency of 25-26 kHz, current pulses with a density of 1⋅10⁵-3⋅10⁵A/cm² and duration 1⋅10 ^-5-2⋅10^-5 s through the tip of the waveguide into the processing zone to the surface of the applied layer of the resulting coating.

EFFECT: increased adhesion strength between the coating and the inner surface of the hollow part.

1 cl, 2 tbl, 1 ex