FIELD: metallurgical and machine building enterprises. SUBSTANCE: sodium or potassium glass (maybe silicate lump) and water glass with components (per cent by weight) as follows are additionally introduced in the composition of doubing being applied: 15 - 35 silicon oxide, 40 - 60 glass, 15 - 35 water glass. EFFECT: increased degree of protection for steel workpieces, including workpieces for wheels of railway cars, against oxidation during process heating, broadened temperature interval of protected action of the doubing, as well as complete keeping the doubing after heating, which may play a part of process lubrication at further processing of workpieces. 1 tbl
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