发明名称 |
Stainless separator for fuel cell and method of manufacturing the same |
摘要 |
A stainless steel separator for fuel cells and a method of manufacturing the same are disclosed. The method includes preparing a stainless steel sheet as a matrix, performing surface modification on a surface of the stainless steel sheet to form a Cr-rich passive film having a comparatively increased amount of Cr in a superficial layer of the stainless steel sheet by decreasing an amount of Fe in the superficial layer of the stainless steel sheet, and forming a coating layer on the surface of the surface-modified stainless steel sheet. The coating layer is one selected from a metal nitride layer (MNx), a metal/metal nitride layer (M/MNx), a metal carbide layer (MCy), and a metal boride layer (MBz) (where 0.5≦x≦1, 0.42≦y≦1, 0.5≦z≦2). |
申请公布号 |
US9425450(B2) |
申请公布日期 |
2016.08.23 |
申请号 |
US201514700676 |
申请日期 |
2015.04.30 |
申请人 |
HYUNDAI STEEL COMPANY |
发明人 |
Jeon Yoo Taek;Chung Kyeong Woo |
分类号 |
H01M2/14;C21D9/00;C21D6/00;C22C38/44;C22C38/42;C22C38/00;H01M8/02;C23C22/73;C23C22/76;C23C22/82;C25D7/06;C25D5/50 |
主分类号 |
H01M2/14 |
代理机构 |
Hauptman Ham, LLP |
代理人 |
Hauptman Ham, LLP |
主权项 |
1. A method of manufacturing a stainless steel separator for fuel cells, the method comprising:
preparing a stainless steel sheet as a matrix; performing surface modification on a surface of the stainless steel sheet to form a Cr-rich passive film having a comparatively increased amount of Cr in a superficial layer of the stainless steel sheet by decreasing an amount of Fe in the superficial layer of the stainless steel sheet; heat-treating the surface-modified stainless steel sheet at 100˜300° C. under a vacuum condition; and forming a coating layer directly on the heat-treated stainless steel sheet, wherein the coating layer is a metal boride layer (MBz), and wherein 0.5≦z≦2. |
地址 |
Incheon KR |