FIELD: metallurgy, machine engineering. SUBSTANCE: method involves addition of filtered off aqueous solution from the stage of semiproduct synthesis 4-amino-6-methoxypyrimidine at concentration 0.05-0.2% of composition to the working medium, wt.-%: resinoid products of oxidation and condensation of 4-amino-6-chloropyrimidine 25-30; 4-amino-6-methoxypyrimidine 2-3; NaCl 9-10, and water - the rest. Filtration is carried out at 3-5 C up to pH 9.0-9.5. Method is used for protection of carbonic, alloyed steel and alloy against corrosion lesion appearing under acid media action. EFFECT: improved method of protection. 1 tbl
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