| 摘要 |
PROBLEM TO BE SOLVED: To supply a fuel cell wherein degradation due to electric erosion at a piping connected to the stack for generating power is hard to occur. SOLUTION: The fuel cell comprises gas supply pipings (4-1 and 6-1) for supplying the gas for power generation which is humidified, a stack (1) which generates power using the gas for power generation, and a gas supply joint piping (12) which connects the gas supply pipings (4-1 and 6-1) to the stack (1). The gas for power generation is guided into the stack (1) through the inside of the joint piping (12). At least a part (12a) of inside surfaces (12a and 12b) of the joint piping (12) is covered with a platinum group metal film (14) comprising an alloy or metal of platinum group element. The platinum group metal film (14) which is hard to suffer electric erosion protects the joint piping (12) from the electric erosion. Further, the platinum group metal film (14) functions as the catalyst which consumes a micro current from the stack (1), which is the cause of electric erosion, to decompose water into hydrogen and oxygen, preventing electric erosion. |
