CPC C25D 3/562 (2013.01) [C25D 5/18 (2013.01); C25D 5/627 (2020.08); C25D 5/611 (2020.08)] | 20 Claims |
1. An electrolyte solution, consisting of:
an aqueous medium;
a divalent iron salt in an amount ranging from about 0.05 to about 0.5 mol per liter of the electrolyte solution;
an alkali metal citrate in an amount ranging from about 0.05 to about 2 mol per liter of the electrolyte solution;
a tungstate salt comprising an alkali metal tungstate in an amount ranging from about 0.1 to about 1.5 mol per liter of the electrolyte solution;
citric acid in an amount ranging from about 0.01 to about 1 mol per liter of the electrolyte solution; and
sodium hydroxide, potassium hydroxide, sulfuric acid, or a combination thereof, wherein the electrolyte solution has a pH of about 3 to about 12.
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