FIELD: chemistry.
SUBSTANCE: method includes washing the cavity to be treated with a solution of a washing reagent at 50-80°C and periodically changing the direction of flow through the cavity, wherein the solution used has components in the following ratio, wt %: sulphamic acid - 2-5, disodium salt of ethylendiaminetetraacetic acid - 1-1.5, corrosion inhibitor - 0.1-0.2, water - the balance. The solution of the washing reagent is then neutralised with sodium hydroxide solution, followed by anti-corrosive treatment of the cavity by washing with a passivating solution.
EFFECT: high effectiveness of the action of the treating liquid on the internal surface of a cavity of heat-exchange equipment.
10 cl, 1 dwg
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