A flow passage member and a reformed gas supply pipe for supplying a reformed gas to a fuel cell stack are provided. Hot air to be supplied to the fuel cell stack flows through the flow passage member. A gold gasket is provided at a joint portion between the flow passage member and the reformed gas supply...http://www.google.com/patents/US7727661?utm_source=gb-gplus-sharePatent US7727661 - Fuel cell system with gold gasket
