| 摘要 |
<p>893,823. Electrodepositing lead dioxide. GIBSON, F. D. March 3,1959 [March 5, 1958], No. 7299/59. Drawings to Specification. Class 41. Lead dioxide is deposited on a graphite anode, the electrolyte comprising an aqueous acid solution of lead nitrate and a surface-active agent, the current density being changed at least once during the process so as to deposit a compact, hard, dense, smooth coating having randomly-oriented crystals and firmly bound to the graphite. The surface active agent may be an alkyl phenoxy polyoxyethylene ethanol. The bath may also contain copper and nickel nitrates and sodium fluoride. The coated graphite may be used as anode in the production of chlorine, chlorates and perchlorates by electrolysis.</p> |
