Coated aluminum bipolar plate for fuel cell applications

A fuel cell flow field plate includes an aluminum substrate plate having a first side and a second side wherein the first side of the aluminum substrate plate defines a plurality of channels for transporting a first fuel cell reactant gas. The flow field plate also includes a first metal interlayer deposited on the first side of the aluminum substrate plate, a second metal interlayer deposited onthe second side of the aluminum substrate plate, a first amorphous carbon layer deposited on the first metal interlayer, and a second amorphous carbon layer deposited on the second metal interlayer. The first amorphous carbon layer and second amorphous carbon layer each independently have a density greater than or equal to 1.2 g/cc. 种燃料电池流场板包括具有第侧和第二侧的铝基板，其中铝基板的第侧限定用于输送第燃料电池反应气体的多个通道。流场板还包括沉积在铝基板的第侧上的第金属夹层、沉积在铝基板的第二侧上的第二金属夹层、沉积在第金属夹层上的第非晶碳层、以及沉积在第二金属夹层上的第二非晶碳层。第非晶碳层和第二非晶碳层各自独立地具有大于等于1.2g/cc的密度。