| 摘要 |
PURPOSE:To obtain a durable anode for electrolysis having low chlorine overvoltage and high oxygen overvoltage by forming the 1st coating layer consisting of Pt and IrO2 and the 2nd coating layer consisting of IrO2, RuO2 and SnO2 on a bulb-shaped metallic substrate. CONSTITUTION:One or plural unit layers each consisting of the 1st coating layer of a mixture of 20-80mol% Pt with 20-80mol% rutile type IrO2 and the 2nd coating layer of a mixture of 3-15mol% rutile type IrO2 with 5-25mol% RuO2 and 60-92mol% SnO2 are formed on a bulb-shaped metallic substrate to obtain an anode for electrolysis suitable for the anode of an electrolytic cell for producing chlorine and alkali. The anode maintains low chlorine overvoltage and high oxygen overvoltage peculiar to the Pt-IrO2 coating layer and high durability is provided to the anode because the dissolution and stripping of the expensive Pt group metals are inhibited.
|
