专利类型: 发明专利 申请号: EP04772710 申请日期: 2004-08-27 公开号: EP1806799B1 公开日期: 2016-09-21 申请人: NIPPON STEEL & SUMITOMO METAL CORP 发明人: TARUTANI YOSHIO;SEKI AKIRA;MAEDA TAKASHI;TAKAHASHI WATARU;DOI TAKASHI 地址: 摘要: A separator material effective for decreasing the weight of fuel cells is provided which is lightweight, has good corrosion resistance, and exhibits a minimized increase in electrical contact resistance during use for a long period. Titanium or a titanium alloy is prepared by melting so as to contain not greater than 5 mass% B, thereby forming a titanium-based material in which fine TiB-type boride particles are precipitated and dispersed. The material is then etched in an aqueous acidic solution such that some of the TiB-type boride particles are exposed on the surface through the passive film formed thereon. 主权项: A titanium-based material for use as a fuel cell separator characterized by containing not greater than 5 mass% boron (B), the boron being present as TiB-type boride particles precipitated and dispersed throughout the material and a part of the boride particles being exposed on a passive film formed on the surface of the material to form paths for electricity. 专利分类号: C22C32/00;H01M8/0226;H01M8/0208;H01M8/0228;C22C14/00 专利状态: 有效专利 代理人: 代理机构: Simons, Amanda Louise 国家及地区: 联系电话:
Titanium based material for fuel cell separator and process for producing same