FIELD: corrosion protection. SUBSTANCE: invention relates to protection of heat-mechanic equipment operated in contact with corrosive mineralized media, for example, on geothermal plants. Method consists in preparing protective medium containing octadecylamine, ensuring its contact with equipment, ageing thus covered equipment for at least 2 h, and removing the medium with velocity no higher than 0.2 m/min. When preparing protective medium, first 60-100 mg/l of piperidine are added and then 30-50 mg/l of octadecylamine. EFFECT: improved protection effect. 2 ex
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