METHOD OF PROCESSING SURFACE OF ARTICLE MADE FROM TITANIUM ALLOY Russian patent published in 2012 - IPC C23C26/00 C23C14/34 

FIELD: machine building.

SUBSTANCE: proposed method comprises preliminary preparation of article surface, placing article and current conduction titanium material in processing zone, creating vacuum in said zone, feeding negative potential, separately, to article and current conducting material, firing arc on current conducting material that burns in vapors of said material to produce plasma, bombarding, cleaning and diffusing article surface and accumulating ions of current conducting material on article surface at article surface temperature below that strength loss in article material to produce coating. Two current conducting materials are arranged in processing zone, one of titanium and another one of nickel-based alloy. Accumulation and diffusion of titanium material ions are performed at negative potential at article of 120-200 V in atmosphere of inert gas consisting of the mix of oxygen and argon in (1-2):1 ratio at 0.05-0.3 MPa. Thereafter, reaction gas feed is terminated to excite vacuum arc at second nickel-based material and to accumulate its ions at negative potential of 15-20 V.

EFFECT: higher resistance against holt-salt corrosion and high-temperature oxidation.

2 cl, 1 tbl, 3 ex