| 摘要 |
PURPOSE:To improve resistance to electrolyte leakage by adding specified amounts of a zinc alloy with a proper composition and an alkali metal sulfide to a gel alkaline electrolyte. CONSTITUTION:A gel negative pole 2 is composed of an active mass of a corrosion-resistant zinc alloy powder prepared by adding proper amounts of indium, lead, bismuth, calcium, and/or aluminum with a proper combination to zinc and a gel alkaline electrolyte in which an alkali metal sulfide in 0.005-0.5 wt.% of the zinc alloy is dissolved as an inorganic inhibitor. The alkali metal sulfide is dissolved in the alkaline electrolyte as an alkali metal ion and a sulfur ion and the sulfur ion reacts with the zinc alloy forms an inert zinc sulfide coating on the zinc alloy surface under the condition of coexisting together with the zinc alloy and thus corrosion reaction of the surface of the zinc alloy is suppressed. As a result, resistance to electrolyte leakage improved. |
