Title:
接触抵抗に優れている高分子燃料電池分離板用ステンレス鋼の製造方法
Document Type and Number:
Japanese Patent JP7133652
Kind Code:
B2
Abstract:
Disclosed is a method of manufacturing a stainless steel with excellent contact resistance for a polymer fuel cell separator. The method of manufacturing a stainless steel with excellent contact resistance for a polymer fuel cell separator according to an embodiment of the present disclosure includes: electrolyzing to remove a first passivation film formed on a cold-rolled thin sheet of a stainless steel comprising, in percent (%) by weight of the entire composition, C: greater than 0 to 0.1%, N: greater than 0 to 0.02%, Si: greater than 0 to 0.25%, Mn: greater than 0 to 0.2%, P: greater than 0 to 0.04%, S: greater than 0 to 0.02 %, Cr: 22 to 34%, Ti: greater than 0 to 0.5%, Nb: greater than 0 to 0.5%, the remainder of iron (Fe) and other inevitable impurities; and immersing in a mixed acid solution of nitric acid and hydrofluoric acid to form a second passivation film on the stainless cold-rolled thin sheet.
Inventors:
Kim, Jung Hee
Kim, Kwang-Min
Seo, Bo Sung
Kim, Kwang-Min
Seo, Bo Sung
Application Number:
JP2020571432A
Publication Date:
September 08, 2022
Filing Date:
June 20, 2018
Export Citation:
Assignee:
POSCO
International Classes:
C25F1/06; C22C38/00; C22C38/28; C23C22/34; C23C22/78; H01M8/021; H01M8/0228
Domestic Patent References:
| JP9165700A | ||||
| JP2000303151A | ||||
| JP2003223904A | ||||
| JP2005302713A | ||||
| JP2010514930A |
Foreign References:
| WO2016105070A1 | ||||
| WO2017105142A1 | ||||
| WO2018198685A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Kyosei International Patent Office