FIELD: chemistry.
SUBSTANCE: method for corrosion protection of the water-steam circuit of a power generating unit with drum boilers includes feeding a complex amine-containing reagent into said circuit. The reagent used is an aqueous solution of a mixture of monoethanolamine, 1,3-oleyl propane diamine of ethoxylated fatty alkylamines and diethylaminoethanol, with the following ratio of components, wt %: monoethanolamine 24.0-26.0, diethylaminoethanol 7.0-8.0, 1,3-oleyl propane diamine 2.0-3.0, ethoxylated fatty alkylamines 0.5-1.5, water - the balance up to 100%. The reagent is fed at one point of the water part of the water-steam circuit, and concentration of said reagent on the entire water-steam circuit is kept in the range of 2.0-50.0 mcg/g.
EFFECT: effective protection of heating surfaces of the water-steam circuit of a boiler from internal corrosion.
2 cl, 2 dwg, 3 tbl
