FIELD: protection against corrosion; chemical industry. SUBSTANCE: solution for passivation of metal surface comprises, g/l : ammonium nitrate, 0.08-0.12; sodium pyrophosphate, 0.004-0.006; sodium stannate, 0.006-0.001, sodium sulfate and/or potassium sulfate, 0.09-0.25; 25-30 % hydrogen peroxide, the balance. EFFECT: improved protection action. 1 tbl
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