| 摘要 |
<p>An improved process for electrowinning metals from an aqueous electrolyte is disclosed. It entails using, as the anode in the electrolytic process, a composite electrode comprising a costing prepared from the bath comprising about 1-12 g/l ruthenium, about 1-12 g/l iridium, about 20-200 8/l equivalent to NaBF4) fluoborate salt, about 1-100 g/l fluoboric acid and sulfamic acid in an amount of up to 2 time the ruthenium plus iridium concentration. The invention includes a composite electrode comprising a conductive substrate, preferably a valve metal, and a coating of the typo referred to above.</p> |
