Austenitic stainless steel sheet for fuel cell separators and production method therefor
US-2022085388-A1 · Mar 17, 2022 · US
Production method for stainless steel sheet for fuel cell separators
US2020248332A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020248332-A1 |
| Application number | US-201816649984-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 27, 2018 |
| Priority date | Oct 25, 2017 |
| Publication date | Aug 6, 2020 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A production method for a stainless steel sheet for fuel cell separators comprises: preparing a stainless steel sheet as a material; thereafter removing an oxide layer at a surface of the stainless steel sheet; and thereafter subjecting the stainless steel sheet to electrolytic etching treatment in an active region of the stainless steel sheet.
First claim
Opening claim text (preview).
1 . A production method for a stainless steel sheet for fuel cell separators, the production method comprising: preparing a stainless steel sheet as a material; thereafter removing an oxide layer at a surface of the stainless steel sheet; and thereafter subjecting the stainless steel sheet to electrolytic etching treatment in an active region of the stainless steel sheet. 2 . The production method for a stainless steel sheet for fuel cell separators according to claim 1 , wherein the oxide layer at the surface of the stainless steel sheet is removed by electrolysis. 3 . The production method for a stainless steel sheet for fuel cell separators according to claim 2 , wherein the electrolysis is cathodic electrolysis. 4 . The production method for a stainless steel sheet for fuel cell separators according to claim 1 , comprising subjecting the stainless steel sheet to surface stabilizing treatment, after the electrolytic etching treatment. 5 . The production method for a stainless steel sheet for fuel cell separators according to claim 4 , wherein the surface stabilizing treatment is immersion in an oxidizing solution or electrolysis in a passive region of the stainless steel sheet. 6 . The production method for a stainless steel sheet for fuel cell separators according to claim 1 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 7 . The production method for a stainless steel sheet for fuel cell separators according to claim 2 , comprising subjecting the stainless steel sheet to surface stabilizing treatment, after the electrolytic etching treatment. 8 . The production method for a stainless steel sheet for fuel cell separators according to claim 3 , comprising subjecting the stainless steel sheet to surface stabilizing treatment, after the electrolytic etching treatment. 9 . The production method for a stainless steel sheet for fuel cell separators according to claim 7 , wherein the surface stabilizing treatment is immersion in an oxidizing solution or electrolysis in a passive region of the stainless steel sheet. 10 . The production method for a stainless steel sheet for fuel cell separators according to claim 8 , wherein the surface stabilizing treatment is immersion in an oxidizing solution or electrolysis in a passive region of the stainless steel sheet. 11 . The production method for a stainless steel sheet for fuel cell separators according to claim 2 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 12 . The production method for a stainless steel sheet for fuel cell separators according to claim 3 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 13 . The production method for a stainless steel sheet for fuel cell separators according to claim 4 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 14 . The production method for a stainless steel sheet for fuel cell separators according to claim 5 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 15 . The production method for a stainless steel sheet for fuel cell separators according to claim 7 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 16 . The production method for a stainless steel sheet for fuel cell separators according to claim 8 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 17 . The production method for a stainless steel sheet for fuel cell separators according to claim 9 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid. 18 . The production method for a stainless steel sheet for fuel cell separators according to claim 10 , wherein a treatment solution used in the electrolytic etching treatment is a sulfuric acid aqueous solution, a hydrochloric acid aqueous solution, or a mixed aqueous solution of sulfuric acid and hydrochloric acid.
Assignees
Inventors
Classifications
- H01M8/021Primary
Alloys based on iron · CPC title
Manufacturing or production processes characterised by the final manufactured product · CPC title
Fuel cells with polymeric electrolytes · CPC title
with niobium or tantalum · CPC title
Very low carbon steels, i.e. having a carbon content of less than 0,01% · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2020248332A1 cover?
- A production method for a stainless steel sheet for fuel cell separators comprises: preparing a stainless steel sheet as a material; thereafter removing an oxide layer at a surface of the stainless steel sheet; and thereafter subjecting the stainless steel sheet to electrolytic etching treatment in an active region of the stainless steel sheet.
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M8/021. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Aug 06 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).