FIELD: electrical engineering; chemical current sources; production of lead-acid cells, additives for sulfuric-acid electrolytes in particular.
SUBSTANCE: proposed additive is made from mixture of sulfate of metal with phosphonocarboxylic acids and aminoalkylphosphonic or hydroxyalkylene diphosphonous acids in diluted sulfuric-acid medium at pH no more than 0.8 and total content of phosphonous acids equal to 0.001-0.015 mass-% and metal sulfate of 10-18 mass-%. Additive may additionally include fluorine-containing surfactants in the amount of 0.01-0.1 mass-%. Proposed additive is used for excluding sulfitation of plates of lead-acid cells and restoration of sulfated storage batteries.
EFFECT: enhanced efficiency.
5 cl, 3 ex
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