NOVELTY - A fuel cell stack apparatus includes at least one component having a surface (20) portion adapted for repelling a liquid. The surface portion includes a substrate (22) with asperities (24) that are distributed so that the surface portion has a contact line density value, measured in meters of contact line per square meter of surface area, greater than or equal to a critical contact line density value "A_L".    USE - Used as fuel cell stack apparatus.    ADVANTAGE - The high degree of repellency of the ultraphobic surfaces inhibits any tendency of water droplets to cling to the surface, thus improving water drainage within the cell.    DETAILED DESCRIPTION - A fuel cell stack apparatus includes at least one component having a surface portion adapted for repelling a liquid. The surface portion includes a substrate with asperities, each asperity having a cross-sectional dimension and an asperity rise angle relative to the substrate. The asperities are distributed so that the surface portion has a contact line density value, measured in meters of contact line per square meter of surface area, greater than or equal to a critical contact line density value "A_L" determined according to formula: A_L = -P/gammacos(thetaa,0 + omega - 90degrees).    P=predetermined maximum expected pressure value at the surface portion;    gamma=surface tension of the liquid;    thetaa,0=experimentally measured true advancing contact angle of the liquid on the asperity material in degrees;    omega=asperity rise angle.    INDEPENDENT CLAIMS are also included for the following:    (A) a component for a fuel cell stack apparatus comprising a body having a surface portion that includes a substrate with asperities; and    (B) a method of making a component for a fuel cell stack apparatus comprising forming a component body having a surface, and disposing asperities on the surface.    DESCRIPTION OF DRAWING(S) - The figure is a perspective, greatly enlarged view of ultraphobic surface where nano/micro scale asperities are arranged in rectangular array.    Surface (20)    Substrate (22)    Asperities (24)    Sides (24)    Tops (28)