FIELD: machine building, namely, removing defect, wear-resistant and decorative coatings of titanium nitrides of steel articles. SUBSTANCE: composition comprises, mas.%: sulfuric acid, 65-70; nitric acid, 9-10; ammonium fluoride, 18-20; disodium salt of naphthalene disulfoacid, 2-4. Thus defect coatings of titanium nitrides may be removed without dissolution of the base of details not only of stainless steel, but of carbon steel, instrumental and alloyed steels. EFFECT: removed articles into production for their further coating. 1 tbl
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