Sheet product used as a bipolar plate in a fuel cell or in an electrolyzer has a conductive corrosion resistant protective coating made from a metal oxide on one side.

摘要

Sheet product has a conductive corrosion resistant protective coating (52) made from a metal oxide on one side. An Independent claim is also included for a process for the production of a plate for a fuel cell. Preferred Features: The product is treated to form a conductive crystal structure. The protective coating is made from the oxides or alloys of zinc, tin or indium. The protective coating consists of a first layer (54) of a metal oxide, a second layer of a dopant (56) and a third layer (58) of metal oxide.