Title:
The manufacturing method of the stainless steel for fuel cell separators, the stainless steel for fuel cell separators, a fuel cell separator, and a fuel cell
Document Type and Number:
Japanese Patent JP6144006
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a stainless steel for fuel battery separators which has excellent electrical conductivity and durability, and a stainless steel for fuel battery separators, a fuel battery separator, and a fuel battery.SOLUTION: The stainless steel for fuel battery separators 4,5 is manufactured by performing an electrolytic treatment on a stainless steel containing Cr in the proportion of 16 mass% or more, followed by an immersion treatment in a fluorine-containing liquid solution. The electrolytic treatment is executed by anode electrolysis, or a combination of anode electrolysis and cathode electrolysis; it is preferred that a quantity Qa of anode electrolysis, and a quantity Qc of cathode electrolysis meet the relation of Qa≥Qc. It is preferred that the fluorine-containing liquid solution is hydrofluoric acid or nitric hydrofluoric acid, in which the hydrofluoric acid concentration [HF] and the nitric acid concentration [HNO] satisfy the relation of [HF]≥0.8×[HNO] at a temperature of 40°C or higher. Incidentally, the units of the hydrofluoric acid concentration [HF] and nitric acid concentration [HNO] are both mass%.
Inventors:
Shinsuke Ide
Tomohiro Ishii
Shin Ishikawa
Yasushi Kato
Tomohiro Ishii
Shin Ishikawa
Yasushi Kato
Application Number:
JP2011257007A
Publication Date:
June 07, 2017
Filing Date:
November 25, 2011
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
H01M8/0202; C22C38/00; C22C38/58; C23C22/34; C23F17/00; C25F1/06; H01M8/10
Domestic Patent References:
| JP2002367622A | ||||
| JP2005166276A | ||||
| JP2004269969A | ||||
| JP2001283880A | ||||
| JP2009043504A | ||||
| JP2010013684A | ||||
| JP2005089800A |
Attorney, Agent or Firm:
Shigeru Inoue