The effect of the orientation in carbon fiber on corrosion rate

In order to improve the durability of phosphoric acid fuel cells (PAFC), it is essential tu suppl-tss the corrosion rate of carbon, which is one of th e important components. In this study, we examined the influence of the ori entation of carbon fibers on their corrosion rate in hot phosphoric acid. O wing to their ability to cover the surface of the graphite basal plane and thereby reducing the active site, onion-like folded carbon fiber were found more stable in hot phosphoric acid than radial folded carbon fibers, given the same degree of graphitization.