FIELD: heat power engineering. SUBSTANCE: steam-and-water channels of power units are prepared through preliminary heating the elements of power unit to a temperature not below 60 C and passivation of surfaces by feeding oxygen to working medium; simultaneously with feeding the oxygen to working medium, surface active substance in form of amine-containing compounds is fed. Preparation of channels before feeding oxygen consists in cleaning their surfaces by feeding the surface active substances to working medium. Surface active substances are substances containing amine. Flotamine is used as amine-containing compound. Feeding oxygen is effected at load of boiler from firing to nominal value at a concentration of it in working medium at channel outlet not below 20 mg/kg. EFFECT: enhanced efficiency. 4 cl, 1 dwg
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