FIELD: chemistry.
SUBSTANCE: invention relates to field of chemistry and can be applied for protection from corrosion of steel surfaces, as well as for applying on surfaces of heating elements of heliotechnical devices. Electrolyte contains sodium nitrate 10-15 g/l, zinc nitrate 5-7 g/l, iron (III) nitrate 5-7 g/l, aluminium monophosphate 3-5 g/l, molybdenum trioxide 0.6-1.2 g/l and compound with structure 
in concentration 0.5-1.0 g/l.
EFFECT: improvement of electrolyte composition and its anticorrosion qualities.
1 tbl, 5 ex
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