FIELD: chemistry.
SUBSTANCE: electrolyte contains orthophosphoric acid 15 vol%, sulphuric acid 15 vol%, fluorine-containing inorganic substance selected from a group comprising ammonium bifluoride, bifluoric acid, sodium fluoride 4-15 g/l and water - the balance.
EFFECT: low power and material consumption, shorter process with high quality of coating.
2 tbl, 2 dwg, 2 ex
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