Loading patent…
AssigneesNippon Steel Corporation, Sintobrator, Ltd.
InventorsHiroshi Kihira, Michio Kaneko, Mitsuharu Yamagata, Koki Tanaka, Yoichi Ikematsu, Yoichi Matsuzaki, Kazuto Kawakami, Wataru Hisada, Suguru Suzuki
Estimating the term…
The present invention releases a method of producing a metal separator for a solid polymer fuel cell by stainless steel, titanium, or titanium alloy during which securing lower cost and mass producibility by using a material having a high workability to form a complicated shape by a high productivity, then using an inexpensive blast process to drive a conductive substance into the surface of the metal separator member, that is, provides a stainless steel, titanium, or titanium alloy solid polymer fuel cell separator comprised of stainless steel, titanium, or titanium alloy in the surface of which a low ion release conductive substance is buried, having an arithmetic mean roughness (Ra) of the separator surface of 0.5 to 5.0 μm, having a 10-point mean roughness (Rz) of 3 to 20 μm, having an average spacing of surface relief shapes (Sm) of 300 μm or less, having values of a warp rate and twist rate of a separator of 0.1 or less, and having a contact resistance value with respect to carbon paper of 15 mωcm2 or less at a surface pressure of 1 MPa.
1-15. (canceled)
A method of evaluation of warp and twist of a solid polymer fuel cell separator comprised of stainless steel, titanium, or a titanium alloy at part or all of the surface of which a low ion release conductive substance is buried,
Dependencies are inferred from the claim text.